JP6267402B2 - Extraction apparatus, extraction method, recording medium, and program - Google Patents

Description

  The present invention relates to an extraction apparatus, an extraction method, a recording medium, and a program that appropriately extract an item currently desired by a user.

  Various techniques for preferentially extracting and presenting items that match the user's preference by analyzing the user's personal information have been proposed.

  For example, in Patent Document 1, a server that provides an online shopping service extracts a product corresponding to a product registered as a history or a favorite of a product viewed or purchased by the user, and presents the product as a recommended product to the user. Is disclosed.

International Publication No. 2012/105069

  However, since the user's preference changes due to various factors, the items extracted as meeting the user's preference based on the user's personal information are often shifted from the items that the user is currently interested in. Therefore, there is a strong demand for a technique for appropriately extracting items that the user currently desires.

  SUMMARY An advantage of some aspects of the invention is that it provides an extraction device, an extraction method, a recording medium, and a program that appropriately extract an item currently desired by a user.

In order to achieve the above object, an extraction apparatus according to the present invention comprises:
Get a set of items to be presented to the user,
Accept the first request from the user,
In response to the first request, a part of the acquired set is extracted as a first group;
In response to the first request, a first response specifying an action that can be taken by the user for each item included in the first group is presented to the user;
Accepting a second request from the user presented with the first response;
In response to the second request, based on which of the items included in the first group the user presented with the first response has taken action, Extract a part other than the first group as the second group,
In response to the second request, a second response specifying an action that the user can take for each item included in the second group is presented to the user.

  According to the present invention, it is possible to appropriately extract an item that a user currently desires.

It is a figure which shows the structure of the extraction system which concerns on embodiment of this invention. It is a figure which shows the hardware constitutions of the extraction apparatus which concerns on embodiment of this invention. It is a figure which shows the function structure of the extraction apparatus which concerns on embodiment of this invention. It is a figure which shows the exchange between an extraction apparatus and a user terminal along a time series. It is a figure which shows the example of a display of the input form for goods search which requires a user to input a search word. It is a figure which shows a mode that the goods group which matches search conditions was displayed on the browser. It is a figure which shows a mode that the detail of the goods designated by the user was displayed on the browser. It is a figure which shows a mode that the goods group relevant to the designated goods was displayed preferentially. It is a figure which shows a mode that the detail of the other goods designated by the user was displayed on the browser. It is a figure which shows a mode that the goods group relevant to the other designated goods was displayed preferentially. It is a figure which shows the goods group displayed when clicking the "next" button in multiple times. It is a figure which shows a mode that the detail of the goods designated by the user was displayed on the browser. It is a figure which shows a mode that the goods group relevant to the designated goods was displayed preferentially. It is a flowchart which shows the flow of the process performed by the extraction apparatus which concerns on embodiment of this invention. It is a figure which shows a mode that the goods group is displayed so that scroll is possible on a browser. It is a figure which shows the example of a display of the purchase form for goods purchase. It is a figure which shows a mode that reading of another goods group is started when it scrolls to the tail of a goods group. It is a figure which shows a mode that the goods group relevant to the goods in a cart was added to the tail of the goods group.

  Embodiments of the present invention will be described below. In addition, this embodiment is for description and does not limit the scope of the present invention. Accordingly, those skilled in the art can employ embodiments in which each or all of these elements are replaced with equivalent ones, and these embodiments are also included in the scope of the present invention. Further, in describing an embodiment of the present invention with reference to the drawings, the same or corresponding parts in the drawings are denoted by the same reference numerals.

  FIG. 1 is a diagram showing a configuration of an extraction system according to an embodiment of the present invention. Hereinafter, a description will be given with reference to FIG.

  The extraction system 1 according to the present embodiment accepts an order from a user (customer) via a communication network 4 (Internet) and provides a net supermarket that delivers products to the user. The extraction system 1 includes an extraction device 2 and user terminals 3 (1), 3 (2),... 3 (m), and the extraction device 2 and each user terminal 3 (m) Communicate with each other via the Internet. Note that m is a positive integer of 1 or more. The communication network 4 is the Internet in this embodiment, but may be a local area network (LAN), a wide area network (WAN), a dedicated line, or the like.

  In the online supermarket, potable water, daily necessities, vegetables, meat, food products, etc. that are bought and sold in existing supermarkets are bought and sold. In the following, the present embodiment will be described by taking a part of these products as an example, but the products handled by the online supermarket are not limited to this and are arbitrary. It should be noted that the product is merely an example of an item, and the control target of the presentation order according to the present invention is not limited to the product.

  Each user terminal 3 (m) is, for example, a PC (Personal Computer), a smartphone, a tablet terminal, or a mobile phone. Can be viewed and ordered.

  The extraction device 2 stores data of products that are listed on the Internet supermarket (hereinafter simply referred to as products), and products to be presented to the user in response to requests from each user terminal 3 (m). And a part of the extracted product is sent to each user. A set of products (items) is a set of products made up of a plurality of products (items), and does not limit the arrangement of products. Moreover, although this embodiment demonstrates the example by which this invention is implement | achieved because the extraction apparatus 2 and the user terminal 3 (m) cooperate, this invention may be implement | achieved by one computer.

  FIG. 2 is a diagram illustrating a hardware configuration of the extraction device 2. The extraction device 2 includes a storage unit 21, a communication unit 22, and a control unit 23, as shown in FIG.

  The memory | storage part 21 is provided with memory | storage devices, such as a hard disk, and memorize | stores the goods currently exhibited by the internet supermarket. Specifically, various pieces of information indicating product attributes such as product name, price, and image data representing the product are stored in association with the product code for identifying the product. The storage unit 21 may be composed of a non-volatile non-transitory storage device other than a hard disk, such as a flash memory, an optical disk, or a magneto-optical disk.

  The communication unit 22 includes a NIC (Network Interface Card), connects the extraction device 2 to the Internet, and communicates with each user terminal 3 (m).

  The control unit 23 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and a program stored in a non-temporary storage device such as a ROM is a temporary storage device. The data is read into a certain RAM, and a command included in the read program is executed by the CPU.

  FIG. 3 is a diagram illustrating a functional configuration of the extraction device 2. The control unit 23 reads out the program stored in the ROM or the like into the RAM and controls the execution of the program, whereby each function shown in FIG. 3 (the receiving unit 31, the product storage unit 32, the terminal information storage unit 33, , An acquisition unit 34, an extraction unit 35, and a presentation unit 36) are realized. The reception unit 31 and the presentation unit 36 are realized by the cooperation of the communication unit 22 and the control unit 23. The acquisition unit 34 and the extraction unit 35 are realized by the control unit 23. Further, the product storage unit 32 and the terminal information storage unit 33 are constructed in the storage unit 21.

  FIG. 4 is a diagram showing the exchange between the extraction device 2 and the user terminal 3 (1) in time series. As shown in the figure, various requests are sent from the user terminal 3 (1) to the extraction device 2.

  The accepting unit 31 accepts various requests sent from the user terminal 3 (1).

  For example, as shown in FIG. 4, when an access request is sent from the user terminal 3 (1) to the extraction device 2, the accepting unit 31 accepts the sent access request and determines the content of the request. If it is determined that the request is an access request from the user terminal 3 (1), the session ID is assigned to the user terminal 3 (1) in order to establish communication between the extraction device 2 and the user terminal 3 (1). Assign (continuation information).

  When the assignment of the session ID is completed, the acquisition unit 34 acquires the product search input form from the product storage unit 32.

  The presentation unit 36 sends the input form acquired by the acquisition unit 34 to the user terminal 3 (1) together with the session ID in order to present the input form to the user.

  FIG. 5 is a diagram showing an input form for searching for products. When receiving the input form from the extracting device 2, the user terminal 3 (1) displays the input form on the browser 41 on the screen of the user terminal 3 (1) as shown in FIG. The user operates the user terminal 3 (1) to input an arbitrary search word into the search box 411 on the input form and clicks the search button 412. Then, as shown in FIG. 4, the user terminal 3 (1) sends a first request for requesting the user to send a product group specified by the search word to the extraction device 2 together with the session ID. The first request includes the search word input in the search box 411 as a search query.

  When accepting the first request and the session ID sent from the user terminal 3 (1), the accepting unit 31 accepts the request based on whether or not the request associated with the session ID exists in the terminal information storage unit 33. It is determined whether the received request is the first request.

  When it is determined that the request is the first request, the acquisition unit 34 selects a set of products that match the search query specified in the first request from the product group stored in the product storage unit 32 in response to the first request. get. Then, the recommended order of the products included in the acquired set of products is determined so that the ranking of the products having a high degree of matching with the search query is higher.

  The degree of matching with the search query is determined by various methods. For example, a high score may be given in the order of a product whose search word and product name match completely, a product that partially matches, and a product that does not match at all, and the higher the score, the higher the degree of matching with the search query.

  The extraction unit 35 extracts, as a first group, a predetermined number of higher-order products in the recommended order from the set of products acquired by the acquisition unit 34.

  As shown in FIG. 4, the presentation unit 36 sends a first response specifying an action that can be taken by the user to the products included in the first group, in response to the first request. In this embodiment, the actions that can be taken by the user are displaying the details of the product and putting the product into the cart, but this is an example and does not limit the present invention. .

  The reception unit 31 stores the received first request in the terminal information storage unit 33 in association with the session ID. The receiving unit 31 stores the nth request (n is an integer of 2 or more) sent from the user terminal 3 (1) thereafter in the terminal information storage unit 33 in association with the session ID. As a result, a series of requests sent from the user terminal 3 (1) are associated as being subsequent to the first request.

  Note that the number of products acquired by the acquisition unit 34 may be enormous depending on the content of the search query. In such a case, even if a set of products that match the search query is sent to the user terminal 3 (1), only a part of the set can be displayed on the screen of the user terminal 3 (1). Therefore, a set of products is sent from the extraction device 2 to the user terminal 3 (1) in a plurality of times. The number of products sent at a time is preferably a predetermined number that can be displayed on the screen of the user terminal 3 (1) at a time. The total number of products that match the search query is information that the user wants to know as a search result, and is sent to the user terminal 3 (1) together with the first response.

  When receiving the first response, the user terminal 3 (1) displays each product included in the first group as a search result on the browser 41.

  FIG. 6 is a diagram illustrating a state in which each product that matches the search word “water” is displayed as a search result on the browser 41 as a result of the user who wants to purchase drinking water specifying “water” as the search word. As shown in the figure, the browser 41 displays each product that matches the search word “water”, that is, “XX-produced mizuna”, “Mizu-boiled lotus”, “XX natural water”, “XX”. “Moisturizing cream” is displayed. The page feed (pagination) displayed immediately below the search box 411 is displayed when the total number of products acquired by the acquisition unit 34 exceeds a predetermined number that can be displayed on the browser 41. In FIG. 6, 1 is shown in bold and 1 is underlined. This indicates that each product displayed on the browser 41 is the search result of the first page. ing.

  As can be seen with reference to FIG. 6, the browser 41 displays a number of products other than potable water that the user intends to purchase (such as mizuna, boiled lotus root, moisturizing cream). Originally, various kinds of drinking water should be displayed with priority, but miscellaneous products are displayed together. That is, the product displayed preferentially as a search result is different from the product that the user currently wants to purchase. Therefore, the present invention grasps the product that the user currently wants to purchase based on the action taken by the user in order to eliminate this gap.

  For example, if the product is displayed on the browser 41 as shown in FIG. 6, if the user is interested in “water” as drinking water, some action is taken on “natural water of ○○”. Should take. As a specific example, if you want to know the contents and price, you should click on the word “detailed display” 414, and if you want to purchase a product, you should click on the word “add to cart”. Therefore, if a product for which the user has taken an action is specified, it is possible to grasp a product that the user is currently interested in.

  Here, it is assumed that the user clicks “detailed display” 414 in FIG. 6 in order to know the content and price of “natural water of OO”. In this case, as shown in FIG. 4, a response request for the action taken by the user, that is, a response request for details of “natural water of XX” is sent from the user terminal 3 (1) to the extraction device 2 together with the session ID. It is done. When accepting the response request and the session ID sent, the accepting unit 31 determines from the content of the response request that the user terminal 3 (1) is requesting to send the details of “natural water of OO”. To do. In accordance with this request, the acquisition unit 34 acquires the details of “natural water of ○○” from the product storage unit 32. In addition, the presentation unit 36 sends the details of the acquired “natural water of ○○” to the user terminal 3 (1) as a response to the action taken by the user. In addition, the reception unit 31 stores in the terminal information storage unit 33 the product “XXX natural water” that the user has taken action in association with the session ID.

  FIG. 7 is a diagram illustrating details of “natural water of OO” displayed on the browser 41. When receiving a response to the action, the user terminal 3 (1) displays details of “natural water of ○○” on the browser 41 as shown in FIG. Note that the user terminal 3 (1) may display the details of the product on, for example, a pop-up screen instead of displaying on the browser 41.

  The user confirms the price and the like and clicks the “Purchase” button when purchasing “natural water of ○○”. If the “natural water of ○○” is not purchased, the “return” button 416 is clicked. Here, if the user clicks the “return” button 416, the display content of the browser 41 returns to FIG. When the user determines that there is no desired product in the list of products displayed on the browser 41, the user clicks the “Next” button 413 to view other products. In this case, as shown in FIG. 4, the user terminal 3 (1) sends a product group other than the product group already sent to the user terminal 3 (1) among the product group specified by the search word “water”. A second request for requesting this is sent to the extraction device 2 together with the session ID.

  When accepting the second request and the session ID sent from the user terminal 3 (1), the accepting unit 31 accepts the request based on whether the request associated with the session ID exists in the terminal information storage unit 33. It is determined whether the request is the first request. And since the 1st request | requirement linked | related with session ID exists in the terminal information storage part 33, it determines with the received request | requirement not being a 1st request | requirement. In this case, the acquisition unit 34 specifies a product stored in the terminal information storage unit 33 in association with the session ID. Note that the specified product corresponds to a product for which the user has taken an action. Here, as described above, “OO natural water” is stored in the terminal information storage unit 33 in association with the session ID. Accordingly, the acquisition unit 34 specifies “natural water of XX” as a product for which the user has taken action.

  If the product for which the user took action is “natural water of ○○”, the user should be interested in drinking water, not vegetables such as “mizuna” or processed side dishes such as “boiled renkon”. Therefore, the acquisition unit 34 changes the recommended order of the products so that the order of the products related to drinking water is higher for the set of products acquired as products matching the search word “water”.

  Next, the extraction unit 35 preferentially extracts a predetermined number of high-order products in the recommendation order from the set of products acquired by the acquisition unit 34 as a second group. However, merchandise included in the sent first group is excluded from the extraction target.

  Next, as shown in FIG. 4, the presentation unit 36 sends a second response specifying an action that the user can take to each product included in the second group in response to the second request. Send to. In addition, the reception unit 31 stores the received second request in the terminal information storage unit 33 in association with the session ID.

  FIG. 8 is a diagram illustrating the second response displayed on the browser 41. When receiving the second response, the user terminal 3 (1) displays the second response on the browser 41 as shown in FIG. As can be seen from the figure, the browser 41 includes products related to drinking water that the user is currently interested in (“△△ natural water”, “XX natural water”, “XX mineral water”). "," XX juice ") are displayed at the top of the search results. In this manner, the extraction device 2 can preferentially present the product desired by the user to the user by setting the product related to the product for which the user has taken action at the top of the recommended order.

  Next, it will be described how the order of product presentation is controlled when the product desired by the user changes. Returning to FIG. 6, for example, it is assumed that the user is interested in the moisturizing cream as a result of browsing each product displayed on the browser 41. In this case, the user should take some action on “XXX moisturizing cream” displayed on the browser 41. Hereinafter, it is assumed that the user clicks “detailed display” 415 to know the content and price of “XXX moisturizing cream”. In this case, a response request for details of “XXX moisturizing complaint” is sent from the user terminal 3 (1) to the extracting device 2 together with the session ID. When accepting the response request and the session ID sent, the accepting unit 31 determines from the content of the response request that the user terminal 3 (1) is requesting to send details of “XX moisturizing cream”. . The acquisition unit 34 acquires the details of “XX moisturizing cream” from the product storage unit 32 in response to the response request. In addition, the presenting unit 36 sends the details of the acquired “XXX moisturizing cream” to the user terminal 3 (1) as a response to the action taken by the user. In addition, the reception unit 31 stores the product “XX moisturizing cream” for which the user has taken action in the terminal information storage unit 33 in association with the session ID.

  FIG. 9 is a diagram showing details of “XXX moisturizing cream” displayed on the browser 41. When receiving a response to the action, the user terminal 3 (1) displays details of “XX moisturizing cream” on the browser 41 as shown in FIG.

  Here, if the user clicks the “return” button 417, the display content of the browser 41 returns to FIG. When the user determines that there is no desired product in the list of products displayed on the browser 41, the user clicks the “Next” button 413 to view other products. In this case, as shown in FIG. 4, the user terminal 3 (1) sends a product group other than the product group already sent to the user terminal 3 (1) among the product group specified by the search word “water”. A second request for requesting this is sent to the extraction device 2 together with the session ID.

  Upon receiving the second request and the session ID sent from the user terminal 3 (1), the accepting unit 31 executes the series of processes described above so that the product that the user has taken action is “XX moisturizing cream. ". Thereby, it turns out that the user is interested in cosmetics now. Accordingly, the acquisition unit 34 changes the recommended order of the products so that the order of the products related to the cosmetics is higher for the set of products acquired as the products matching the search word “water”.

  Next, the extraction unit 35 preferentially extracts a predetermined number of high-order products in the recommendation order from the set of products acquired by the acquisition unit 34 as a second group. However, merchandise included in the sent first group is excluded from the extraction target.

  As shown in FIG. 4, the presentation unit 36 sends a second response specifying an action that the user can take to each product included in the second group to the user in response to the second request. . In addition, the reception unit 31 stores the received second request in the terminal information storage unit 33 in association with the session ID.

  FIG. 10 is a diagram illustrating the second response displayed on the browser 41. When receiving the second response, the user terminal 3 (1) displays the second response on the browser 41 as shown in FIG. As can be seen from the figure, the browser 41 displays products related to cosmetics that the user is currently interested in (“ΔΔ moisturizing cream”, “XX moisturizing cream”, “XX facial cleansing cream”, “ "Cream skin water") is displayed at the top of the search results. Thus, even if the product desired by the user changes, the extraction device 2 can appropriately control the order in which the products are presented in accordance with the change.

  As described above, what kind of second response is presented to the user when the user takes an action on the product included in the first response has been described. Next, with reference to FIGS. 11 to 13, what kind of (n + 1) response is presented to the user when the user takes an action on the product included in the nth response will be described.

  FIG. 11 is a diagram showing the nth response displayed on the browser 41. As shown in the figure, the browser 41 displays a list of products such as “XX barley tea”, “XX green tea”, “□□ oolong tea”, “Assorted 24 XX oolong tea”. Here, it is assumed that the user clicks “detail display” 418 in order to know the details of “Assortment of 24 oolong tea”. In this case, as shown in FIG. 4, a response request for details of “Assorted 24 oolong tea” is sent from the user terminal 3 (1) to the extraction device 2 together with the session ID. When accepting the response request and session ID sent, the accepting unit 31 requests that the user terminal 3 (1) send details of “Assorted 24 oolong tea” from the content of the response request. Determine. In response to this response request, the acquisition unit 34 acquires the details of “Assorted 24 oolong tea” from the product storage unit 32. In addition, the presenting unit 36 sends the details of the acquired “Assorted 24 oolong tea” to the user terminal 3 (1) as a response to the action taken by the user. In addition, the reception unit 31 stores in the terminal information storage unit 33 the product “XX assortment of 24 oolong teas” taken by the user in association with the session ID.

  FIG. 12 is a diagram showing details of “Assorted 24 OO oolong teas” displayed on the browser 41. When the user terminal 3 (1) receives a response to the action, the user terminal 3 (1) displays the details of “Assorted 24 oolong tea” on the browser 41 as shown in FIG.

  If the user clicks the “return” button 419, the display content of the browser 41 returns to FIG. When the user determines that there is no desired product in the list of products displayed on the browser 41, the user clicks the “Next” button 413 to view other products. In this case, as shown in FIG. 4, the user terminal 3 (1) sends a product group other than the product group already sent to the user terminal 3 (1) among the product group specified by the search word “water”. The (n + 1) th request is sent to the extraction device 2 together with the session ID.

  When accepting the (n + 1) th request and the session ID sent from the user terminal 3 (1), the accepting unit 31 determines whether the accepted request is the first request. If the receiving unit 31 determines that the request is not the first request, the acquiring unit 34 specifies a product stored in the terminal information storage unit 33 in association with the session ID. Note that the identified product corresponds to a product for which the user has taken an action while the extraction device 2 receives a series of requests [first to (n + 1) requests]. Here, in the terminal information storage unit 33, “XX natural water”, “XX barley tea”,..., “Assorted 24 XX oolong tea” are stored in association with the session ID. To do. In this case, the acquisition unit 34 identifies “XX natural water”, “XX barley tea”,..., “Assorted 24 XX oolong tea” as the product for which the user has taken action.

  If the product for which the user took action is “XX Natural Water”, “XX Barley Tea” ..., “Assorted 24 XX Oolong Tea”, the user is interested in assorted tea instead of individual tea. There should be. Therefore, in such a case, the acquisition unit 34 sets the recommended order of the products so that the order of the products related to the assortment of tea is higher in the set of products acquired as products that match the search word “water”. change.

  Next, the extraction unit 35 preferentially extracts a predetermined number of higher-order products in the recommendation order from the set of products acquired by the acquisition unit 34 as the (n + 1) th group. However, the products included in the sent first to n groups are excluded from the extraction targets.

  As shown in FIG. 4, the presentation unit 36 responds to the (n + 1) th request with an (n + 1) th response specifying an action that can be taken by the user for each product included in the (n + 1) th group. And send it to the user. The receiving unit 31 stores the received (n + 1) th request in the terminal information storage unit 33 in association with the session ID.

  FIG. 13 is a diagram showing the (n + 1) th response displayed on the browser 41. Upon receiving the (n + 1) th response, the user terminal 3 (1) displays the (n + 1) th response on the browser 41 as shown in FIG. As can be seen from the figure, the browser 41 has products related to the assortment of tea that the user is currently interested in ("Assortment of 24 bottles of △△ Oolong tea", "Assortment of 10 Oolong tea", "O "Assorted 6 barley teas" and "Assorted 24 green teas" are displayed at the top of the search results. In this way, the extraction device 2 can continuously execute the narrowing down of products desired by the user.

  FIG. 14 is a flowchart showing a flow of processing executed by the extraction device 2 according to the embodiment of the present invention. Hereinafter, a description will be given with reference to FIG. This processing is started by executing a program on the hardware of the extraction device 2, and the extraction device 2 is realized by this processing.

  When this process is started, the extraction apparatus 2 starts an application for the net super, and initializes various parameters used in the application (step S1). Next, the reception unit 31 receives a request sent from the user terminal 3 (m) (step S2) and determines the content of the request (step S3). If it is determined that the request is an access request from the user terminal 3 (m), the user terminal 3 (m) is used to establish communication between the extraction device 2 and the user terminal 3 (m). A session ID is assigned to (step S4). Next, the presentation unit 36 sends the product search input form shown in FIG. 5 to the user terminal 3 (m) together with the session ID (step S5).

  The user terminal 3 (m) receives the input form and the session ID, and displays the input form on the browser 41 as shown in FIG. On the other hand, the user inputs a predetermined search word into the search box 411 and clicks the search button 412. Then, a 1st request | requirement is sent to the extraction apparatus 2 from user terminal 3 (m) with session ID, and the reception part 31 receives the 1st request | requirement and session ID which were sent (step S2). Next, the accepting unit 31 determines whether or not the most recently accepted request is the first request based on whether or not the request associated with the session ID exists in the terminal information storage unit 33 (step S3). When the receiving unit 31 determines that the request is the first request, the acquisition unit 34 matches the search query specified in the first request from the product stored in the product storage unit 32 in response to the first request. A set of products is acquired (step S6). Then, the recommended order of the products included in the acquired set of products is determined so that the rank of the products having a high degree of matching with the search query is higher (step S7). Next, the extraction unit 35 extracts a predetermined number of high-order products in the recommended order as a first group (step S8), and the presentation unit 36 can be taken by the user for the products included in the first group. A first response designating an appropriate action is sent to the user (step S9). Further, the receiving unit 31 stores the received first request in the terminal information storage unit 33 in association with the session ID (step S10).

  The user terminal 3 (m) receives the sent first response and displays it on the browser 41. On the other hand, when the user takes a predetermined action on any of the products included in the first response, a response request for a response to the action taken by the user is extracted from the user terminal 3 (m) together with the session ID. Sent to device 2. On the other hand, the reception unit 31 receives the response request and the session ID that have been sent (step S2). Then, the content of the request is determined (step S3), and it is determined that the request is a response request for a response to the action taken by the user. In this case, predetermined function units (acquisition unit 34, extraction unit 35, presentation unit 36, etc.) respond to the action taken by the user (step S11). And the goods which the user took action are linked | related with session ID, and memorize | stored in the terminal information storage part 33 (step S12).

  Next, when the user clicks the “Next” button 413 on the browser 41, the second request is sent from the user terminal 3 (m) to the extraction device 2 together with the session ID. In response to this, the accepting unit 31 accepts the second request and the session ID sent (step S2). And based on whether the request | requirement linked | related with the said session ID exists in the terminal information storage part 33, it is discriminate | determined whether the request | requirement received most recently is a 1st request | requirement (step S3). And since the 1st request | requirement linked | related with session ID exists in the terminal information storage part 33, it determines with the request | requirement received most recently not being a 1st request | requirement. In this case, the acquisition unit 34 specifies the product stored in the terminal information storage unit 33 in association with the session ID as the product for which the user took an action (step S13). Then, the recommended order of the products determined in the process of step S7 is changed so that the rank of the products related to the specified products is higher (step S14).

  Next, the extraction unit 35 extracts a predetermined number of high-order products in the recommended order as a second group (step S15), and the presentation unit 36 specifies actions that the user can take for the second group. The second response is sent to the user (step S16). Further, the receiving unit 31 stores the received second request in the terminal information storage unit 33 in association with the session ID (step S17).

  The user terminal 3 (m) receives the second response and displays it on the browser 41. On the other hand, when the user takes a predetermined action on any of the products included in the second response, a response request for a response to the action taken by the user is extracted from the user terminal 3 (m) together with the session ID. The data is sent to the device 2 and the above-described processing of step S11 and step S12 is executed again. In addition, each time the user clicks the “Next” button 413 on the browser 41, the processing of steps S13 to S17 described above is executed.

  If it is determined in step S3 that the request does not correspond to any of the access request, the first to nth requests, and the response request for the action taken by the user, predetermined processing is executed based on the request. (Step S18).

  As described above, according to the extraction device 2, the order of presentation of a large number of products can be appropriately controlled by grasping the action taken by the user.

(Modification)
Although the embodiment of the present invention has been described above, the above embodiment is an example, and the scope of application of the present invention is not limited to this. That is, the embodiments of the present invention can be applied in various ways, and all the embodiments are included in the scope of the present invention.

  In the above embodiment, since the unpresented search result was displayed on the transition destination page, the example of controlling the presentation order of the products displayed on the transition destination page has been described, but the present invention is limited to this. However, the display order can be controlled even if the display form of the search results is different from the example of the above embodiment. An example will be described below.

  FIG. 15 is a diagram illustrating a state in which the product group is displayed on the browser 41 so as to be scrollable. In the figure, a scroll bar 420 is displayed on the right end of the browser 41 so as to be scrollable. When the scroll bar 420 is scrolled downward, products related to the search word are displayed on the browser 41 one after another. ing. The product displayed in the figure is the i-th response (a part of a set of products related to the search word “water”) sent by the presentation unit 36 of the extraction device 2. However, i is an integer of 1 or more. Further, the contents of a series of processes for displaying the i-th response on the browser 41 are the same as those in the above-described embodiment, and thus description thereof is omitted.

  Here, if the user operates the user terminal 3 (1) and clicks “Add to cart” 421, a notification that “Add to cart” 421 related to “XX produced mizuna” has been clicked. Sent from the user terminal 3 (1) to the extraction device 2. And the reception part 31 receives notification similarly to the said embodiment, and memorize | stores it in the terminal information storage part 33. FIG. Then, the presentation unit 36 sends the purchase form for purchasing the product shown in FIG. 16 to the user terminal 3 (1).

  FIG. 16 is a diagram illustrating a purchase form for purchasing a product. When receiving the purchase form sent from the presentation unit 36, the user terminal 3 (1) displays the purchase form on the browser 41 as shown in FIG. On the other hand, the user clicks the “Purchase” button when purchasing the “XX produced mizuna”, and clicks the “Return” button 422 when not purchasing. Here, if the user clicks the “return” button 422, the display content of the browser 41 returns to FIG. When the user determines that there is no desired product among the products displayed on the browser 41, the user scrolls the scroll bar 420 downward to browse other products.

  FIG. 17 is a diagram illustrating a state in which reading of another product group is started when scrolling to the end of the product group. As shown in the figure, when the scroll bar 420 is scrolled to the lower limit of the scrollable range, the end of the i-th response is displayed on the browser 41. In this case, the user terminal 3 (1) requests to send a product group other than the product group already sent to the user terminal 3 (1) among the product groups specified by the search word “water”. ) A request is sent to the extraction device 2, and a message indicating that another product is being read is displayed at the end of the i-th response.

  On the other hand, in response to the (i + 1) th request, the extraction unit 35 is based on the product that the user has taken action while the first to (i + 1) requests are sent from the user terminal 3 (1). Then, a part of the set of products related to the search word “water” is extracted as the (i + 1) th group. Then, the presentation unit 36 sends an (i + 1) th response specifying an action that can be taken by the user to the product included in the (i + 1) th group in response to the (i + 1) th request. .

  FIG. 18 is a diagram illustrating the (i + 1) th response displayed on the browser 41. Upon receiving the (i + 1) th response, the user terminal 3 (1) adds each product included in the (i + 1) th group to the end of the ith response as shown in FIG.

  In other words, according to the example described above, the product desired by the user is displayed at the end of the screen only by the user scrolling the screen. Thus, the present invention can be applied not only to a specific one of various display modes of search results but also to various display modes.

  Moreover, in the said embodiment, when extracting some goods from the collection of goods, all the goods which the user took action were considered. However, if only products for which actions have been taken most recently are taken into consideration, products that better match the user's preferences should be extracted. Therefore, the products considered in the product extraction may be limited to a predetermined number of products that the user has recently taken action.

  Specifically, the extraction unit 35 responds to the (n + 1) th request sent from the user terminal 3 (m), among the products that the user has taken action while the first to nth requests are sent. A part of the set of products acquired by the acquisition unit 34 may be extracted as the (n + 1) th group based on a predetermined number of products that the user has recently taken action. However, products included in the first to n groups that have been sent to the user terminal 3 (m) are excluded from the extraction targets. An example of a method for determining a predetermined number of products that the user has recently taken action is a method of using a time stamp attached to each notification when each notification is stored in the terminal information storage unit 33. It is done.

  In addition, for example, when the genre of the product that the user has taken action in the first to fifth counting from the latest is “book”, and the genre of the product that the user has taken action in the sixth or later is “food” The user may have lost interest in the product for which the action has been taken after the sixth. Therefore, the extraction unit 35 determines whether the product has the same genre as the product that the user has recently taken action for, such as the second, third, fourth, etc., and the genre of the sixth product is the latest, for example. If the genre is different from the genre of the product for which the user took action, the user from the set of products acquired by the acquisition unit 34 based on the product (1st to 5th products) for which the user took action before that You may extract the goods sent to.

  In the above embodiment, an example has been described in which a set of products is acquired based on a search query included in the first request, and a part of the acquired set of products is sent to the user. In this example, a search query is required to execute a series of processes. However, it is also possible to execute a series of processes according to the present invention without using a search query.

  For example, the acquisition unit 34 acquires in advance from the product storage unit 32 all products that are exhibited in the online supermarket. Next, when there is a first request, the extraction unit 35 appropriately extracts recommended products from each genre among all the products acquired by the acquisition unit 34. Then, the presentation unit 36 sends a list of recommended products extracted by the extraction unit 35 to the user. On the other hand, the user browses some products that are interested from the list of recommended products. When the user clicks the “next” button, the recommended product browsed by the user is notified to the extraction device 2. Then, the acquisition unit 34 specifies the genre of the product viewed by the user, and determines the recommended order of unsent products so that the order of the product of the specified genre is higher. And if there exists a 2nd request | requirement, the extraction part 35 will extract the predetermined number of high-order goods in a recommendation order, and the presentation part 36 will send the list of the extracted goods to a user. If the order of presentation of products is controlled by such a method, a search query is not necessary for executing a series of processes according to the present invention.

  In the above embodiment, every time the user takes an action, the user terminal 3 (1) notifies the extraction device 2 to that effect. However, the notification is temporarily stored in the browser 41 as notification schedule information ( For example, the notification schedule information may be recorded in a cookie), and the notification schedule information may be sent to the extraction device 2 when a request is sent from the user terminal 3 (1) to the extraction device 2.

  In addition, the items to be controlled by the present invention include various items other than products. For example, items that are not intended for sale are included, and information that is intangible is also included. Hereinafter, an example in which the present invention controls the order of information presentation will be described.

  In this example, the extraction device 2 provides an information search service using the Internet. When the extraction device 2 is accessed from the user terminal 3 (m), an information retrieval input form is sent from the extraction device 2 to the user terminal 3 (m), and the input form is displayed on the browser of the user terminal 3 (m). Is done. In addition, a search box and a search button are displayed on the input form. When the user inputs a predetermined search word into the search box and clicks the search button, a search result that matches the search word is displayed on the browser.

  Here, it is assumed that a user wants to examine a recipe for meat dishes, enters a search word “meat dishes” in the search box, and clicks the search button. Then, the 1st request | requirement which designates the search query "meat dish" is sent to the extraction apparatus 2 from the user terminal 3 (m), and the reception part 31 receives the 1st request | requirement sent. In response to the first request, the acquisition unit 34 acquires a set of recipes that match the search query “meat” from a server on the Internet. Then, the recommended order of recipes included in the acquired set is determined so that the order of recipes having a high degree of matching with “meat” is higher. Next, the extraction unit 35 extracts a predetermined number of higher-order recipes in the recommendation order, and the presentation unit 36 specifies a first response that specifies an action that can be taken by the user for the extracted predetermined number of recipes. Is sent to the user.

  The user terminal 3 (m) receives the first response, and displays the list of recipe titles and headings included in the first response in a manner in which the details of the recipe can be browsed by the user clicking the titles and headlines. indicate. Hereinafter, it is assumed that titles such as “hamburger recipe”, “barbecue recipe”, “fried rice recipe”, etc. are displayed on the browser. Further, it is assumed that the user is interested in the yakiniku recipe and clicks on the title “Yakiniku recipe”. Then, a response request for details of the “grilled meat recipe” is sent from the user terminal 3 (m) to the extraction device 2, while the details of the “grilled meat recipe” are transmitted from the extraction device 2 to the user terminal 3 (m ). Further, the extraction device 2 stores that the object on which the user has taken action is a “grilled meat recipe”.

  Next, when the user clicks the “Next” button on the browser, a second request is sent from the user terminal 3 (m) to the extraction device 2 and the second request sent by the accepting unit 31 is sent. Suppose you accept. Then, the extraction device 2 determines what information the user has taken an action while receiving the first and second requests. Then, if it is specified that the user has taken an action with respect to the “grilled meat recipe”, the recipe that matches the “meat dish” acquired by the acquisition unit 34 so that the rank of “grilled meat recipe” is higher. Change the recommendation order.

  In response to the second request, the extraction unit 35 extracts a predetermined number of high-order recipes in the recommendation order, and the presentation unit 36 specifies actions that can be taken by the user for the extracted predetermined number of recipes. The second response is sent to the user. However, as described above, since the rank of the “grilled meat recipe” has been changed to the higher rank, the “grilled meat recipe” is preferentially extracted and sent to the user as a second response. Accordingly, the browser 41 preferentially displays the “baked meat recipe” that the user is currently interested in as a continuation of the search result. As described above, the present invention can also control the order in which information is presented, and information is included in items to be controlled by the present invention.

  Moreover, although the said embodiment demonstrated the example in which this invention was implement | achieved because the extraction apparatus 2 and the user terminal 3 (m) cooperate, this invention may be implement | achieved by one computer. Hereinafter, an example in which the extraction device 2 alone realizes the present invention will be described.

  In this example, the extraction device 2 has a book database that stores a large number of books, and provides a book search service to the user. The book database may store a list of books downloaded via the Internet, or a list of books acquired via an interface from a storage terminal such as a USB (Universal Serial Bus) memory. May be. When there is an instruction from the user to activate an application for a book search service via a mouse or keyboard operation, the extraction device 2 starts the application and displays a book search screen. Then, a predetermined number of high-order books are extracted in a predetermined recommended order of books, and the extracted books are displayed on the book search screen as a list of recommended books.

  The list of recommended books includes books of various genres such as business books, computer / IT, and novels. Here, it is assumed that the user operates the mouse or the like to put the book A (the genre of the book A is a novel) in the recommended book list into the cart. Then, the extraction device 2 stores that the user has taken an action on the book A. When the user gives an instruction to present a list of other books, the book that the user has taken action is identified as the book A. As described above, since the genre of the book A is “novel”, the recommended order of the books is changed so that the rank of the book of the genre “novel” is higher. Then, a predetermined number of high-order books (novel books) are preferentially extracted in the recommended order, and the extracted books are displayed on the book search screen. Thus, the present invention can be realized even with the extraction device 2 alone.

  In addition, in the present specification, the product may be a product belonging to various genres such as clothing, an electric product, a book, a ticket, and the like, in addition to the drinking water and food exemplified in the above embodiment. In addition to tangible items such as food and cosmetics, the product includes intangible items such as hotel reservations, online tickets, and software licenses. The product also includes services.

  In addition, not only can the configuration for realizing the functions according to the present invention be provided in advance as the extraction device 2, but also an existing personal computer or information terminal device can be used as the extraction device 2 according to the present invention by applying the program. It can also function. That is, by applying the program for realizing each functional configuration by the extraction device 2 exemplified in the above embodiment so that a CPU or the like for controlling an existing personal computer or information terminal device can be executed, the present invention is applied. The extraction device 2 can function. In addition, the extraction method according to the present invention can be implemented using the extraction device 2.

  Moreover, the application method of such a program is arbitrary. For example, the program can be stored and applied to a computer-readable recording medium [CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Versatile Disc), MO (Magneto Optical disc), etc.], the Internet, etc. It is also possible to apply the program by storing it in a storage on the network and downloading it.

  It should be noted that the present invention can be variously modified and modified without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

(Summary)
The summary of the present invention is described below.

The extraction device 2 according to one aspect of the present invention is:
An acquisition unit 32 for acquiring a set of items to be presented to the user;
Accepting unit 31 for accepting a first request from a user;
An extraction unit 35 for extracting a part of the acquired set as a first group in response to the first request;
A presentation unit 36 that presents to the user a first response that specifies an action that the user can take for each item included in the first group, in response to the first request;
With
The accepting unit 31 accepts a second request from the user presented with the first response,
In response to the second request, the extraction unit 35 is acquired based on which of the items included in the first group the user to whom the first response is presented has taken an action. A part of the set other than the first group is extracted as a second group;
In response to the second request, the presenting unit 36 presents a second response specifying an action that the user can take to each item included in the second group in response to the second request.

For an integer n greater than or equal to 2,
The accepting unit 31 accepts an (n + 1) th request from the user in which an nth response specifying an action that the user can take for each item included in the nth group is presented,
In response to the (n + 1) th request, the extraction unit 35 responds to any of the items included in the first group to the nth group when the first response to the nth response is presented. Based on whether an action has been taken, a part other than the first group to the nth group is extracted as the (n + 1) th group from the acquired set,
In response to the (n + 1) th request, the presentation unit 36 sends an (n + 1) th response specifying an action that can be taken by the user to each item included in the (n + 1) th group. May be presented.

  The extraction unit 35 determines the (n + 1) th group based on a predetermined number of items that have recently taken an action among the items included in the first group to the nth group that the user has taken action on. It may be extracted.

The receiving unit 31 associates continuation information indicating that the request subsequent to the second request is subsequent to the first request,
In response to the nth request, the extraction unit 35 determines that the first request to the nth request are a series of requests from the user based on the continuation information, and the determined series of requests The n-th group may be extracted based on an item that the user has taken an action while being received by the receiving unit.

For an integer i greater than or equal to 1,
The presentation unit 36 displays the i-th response in a scrollable manner on the screen that can be browsed by the user. When the end of the i-th response is displayed on the screen, the (i + 1) th request is sent and the acceptance is received. May be accepted by the department.

  The acquisition unit 34 may search for an item that matches the query specified in the first request, and the search result may be a set of items to be presented to the user.

  The acquisition unit 34 may acquire a set of items to be presented to the user prior to receiving the first request.

The extraction device 2 is realized by a terminal and a server that can communicate via a communication network,
The first request is transmitted from the user to the server via the terminal,
The first response is generated by the server and presented to the user via the terminal;
The action is instructed from the user via the terminal,
The second request is transmitted from the user to the server via the terminal,
The second response may be generated by the server and presented to the user via the terminal.

An extraction method according to an aspect of the present invention includes:
An acquisition step of acquiring a set of items to be presented to the user;
An accepting step for accepting a first request from a user;
An extraction step of extracting a part of the acquired set as a first group in response to the first request;
A presenting step of presenting to the user a first response specifying an action that can be taken by the user for each item included in the first group in response to the first request;
With
In the receiving step, a second request sent from the user presented with the first response is received;
In the extraction step, in response to the second request, the acquired information is obtained based on which of the items included in the first group the user to whom the first response is presented has taken an action. A part of the set other than the first group is extracted as a second group,
In the presenting step, a second response designating an action that the user can take for each item included in the second group is presented to the user in response to the second request.

The recording medium according to one aspect of the present invention is
An acquisition unit 34 for acquiring a set of items to be presented to the user by the computer;
Accepting unit 31 for accepting a first request from a user;
An extraction unit 35 for extracting a part of the acquired set as a first group in response to the first request;
A presentation unit 36 that presents to the user a first response that specifies an action that the user can take for each item included in the first group, in response to the first request;
A computer-readable recording medium storing a program to function as
The accepting unit 31 accepts a second request from the user presented with the first response,
In response to the second request, the extraction unit 35 is acquired based on which of the items included in the first group the user to whom the first response is presented has taken an action. A part of the set other than the first group is extracted as a second group;
In response to the second request, the presenting unit 36 presents a second response specifying an action that the user can take to each item included in the second group in response to the second request.

A program according to one aspect of the present invention is:
An acquisition unit 34 for acquiring a set of items to be presented to the user by the computer;
Accepting unit 31 for accepting a first request from a user;
An extraction unit 35 for extracting a part of the acquired set as a first group in response to the first request;
A presentation unit 36 that presents to the user a first response that specifies an action that the user can take for each item included in the first group, in response to the first request;
A program that functions as
The accepting unit 31 accepts a second request from the user presented with the first response,
In response to the second request, the extraction unit 35 is acquired based on which of the items included in the first group the user to whom the first response is presented has taken an action. A part of the set other than the first group is extracted as a second group;
In response to the second request, the presenting unit 36 presents a second response specifying an action that the user can take to each item included in the second group in response to the second request.

  According to the present invention, it is possible to provide an extraction device, an extraction method, a recording medium, and a program that appropriately extract an item that a user currently desires.

DESCRIPTION OF SYMBOLS 1 Extraction system 2 Extraction apparatus 3 (1)-(m) User terminal 4 Communication network 21 Storage part 22 Communication part 23 Control part 31 Reception part 32 Goods storage part 33 Terminal information storage part 34 Acquisition part 35 Extraction part 36 Presentation part 41 Browser 411 Search box 412 Search button 413 Next button 416, 417, 419, 422 Back button 420 Scroll bar

Claims (9)

An acquisition unit for acquiring a set of items to be presented to the user;
A reception unit for receiving a first request from a user;
An extraction unit for extracting a part of the acquired set as a first group in response to the first request;
A presentation unit that presents to the user a first response that specifies an action that the user can take for each item included in the first group, in response to the first request;
With
The accepting unit accepts a second request from the user presented with the first response via the presented first response,
In response to the second request, the extraction unit prioritizes an item related to an item for which the user has taken the action among the items belonging to the first group, and acquires the item. A part other than the first group is extracted from the set as a second group;
The presenting unit presents, to the user, a second response that specifies an action that the user can take for each item included in the second group, in response to the second request ,
For an integer n greater than or equal to 2,
The reception unit receives an nth response from the user who has been presented with an nth response designating an action that the user can take for each item included in the nth group via the presented nth response. n + 1) Accept the request,
In response to the (n + 1) th request, the extraction unit performs the action most recently by the user to whom the first response to the nth response is presented among the items belonging to the first group to the nth group. Prioritizing items related to the predetermined number of items taken, a part other than the first group to the nth group is extracted as the (n + 1) th group from the acquired set,
The presenting unit sends an (n + 1) th response specifying an action that the user can take to each item included in the (n + 1) th group to the user in response to the (n + 1) th request. Present,
An extraction device characterized by that. The reception unit associates continuation information indicating that the request subsequent to the second request is subsequent to the first request,
In response to the nth request, the extraction unit determines that the first request to the nth request are a series of requests from the user based on the continuation information, and the determined series of requests is received as the acceptance Extracting the n th group based on the item that the user has taken action while being accepted by the department;
The extraction device according to claim 1 . For an integer i greater than or equal to 1,
The presentation unit displays the i-th response in a scrollable manner on the screen that can be browsed by the user. When the end of the i-th response is displayed on the screen, the (i + 1) th request is sent, and the reception unit The extraction apparatus according to claim 1, wherein the extraction apparatus is accepted by the following. The action is an action for requesting detailed display of any item belonging to the first group,
After the detailed display is made, after the presentation to the user returns to the first response, the second request is issued via the returned first response,
The acquisition unit searches for an item that matches the query specified in the first request, and sets the searched result as the acquired set of items to be presented to the user. Item 2. The extraction device according to Item 1.   The extraction device according to claim 1, wherein the acquisition unit acquires a set of items to be presented to the user prior to receiving the first request. The extraction device is realized by a terminal and a server capable of communicating via a communication network,
The first request is transmitted from the user to the server via the terminal,
The first response is generated by the server and presented to the user via the terminal;
The action is instructed from the user via the terminal,
The second request is transmitted from the user to the server via the terminal,
The second response is generated by the server and presented to the user via the terminal.
The extraction device according to claim 1. An acquisition step in which the extraction device acquires a set of items to be presented to the user;
A first accepting step in which the extracting device accepts a first request from the user;
A first extraction step in which the extraction device extracts a part of the acquired set as a first group in response to the first request;
A first presentation step in which the extraction device presents a first response designating an action that can be taken by the user to each item included in the first group in response to the first request. When,
A second accepting step in which the extraction device accepts a second request from the user presented with the first response via the presented first response;
In response to the second request, the extraction device gives priority to an item related to an item for which the user who has taken the action is presented among the items belonging to the first group, the acquisition. A second extraction step of extracting a part other than the first group as a second group from the set obtained,
A second presentation step in which the extraction device presents a second response specifying an action that the user can take to each item included in the second group to the user in response to the second request. When,
For an integer n greater than or equal to 2,
The extraction device receives the nth response from the user who has been presented with the nth response designating an action that the user can take for each item included in the nth group via the presented nth response ( n + 1) The (n + 1) th reception step for receiving a request;
In response to the (n + 1) th request, the extraction device is the user who has presented the first response to the nth response among the items belonging to the first group to the nth group. (N + 1) extraction step of extracting a part other than the first group to the nth group as the (n + 1) th group from the acquired set by giving priority to items related to the predetermined number of items taken When,
In response to the (n + 1) th request, the extraction device sends an (n + 1) th response specifying an action that can be taken by the user to each item included in the (n + 1) th group. The (n + 1) th presentation step to present;
An extraction method comprising: An acquisition unit for acquiring a set of items that the computer should present to the user;
A reception unit for receiving a first request from a user;
An extraction unit for extracting a part of the acquired set as a first group in response to the first request;
A presentation unit that presents to the user a first response that specifies an action that the user can take for each item included in the first group, in response to the first request;
A computer-readable recording medium storing a program to function as
The accepting unit accepts a second request from the user presented with the first response via the presented first response,
In response to the second request, the extraction unit prioritizes an item related to an item for which the user has taken the action among the items belonging to the first group, and acquires the item. A part other than the first group is extracted from the set as a second group;
The presenting unit presents, to the user, a second response that specifies an action that the user can take for each item included in the second group, in response to the second request ,
For an integer n greater than or equal to 2,
The reception unit receives an nth response from the user who has been presented with an nth response designating an action that the user can take for each item included in the nth group via the presented nth response. n + 1) Accept the request,
In response to the (n + 1) th request, the extraction unit performs the action most recently by the user to whom the first response to the nth response is presented among the items belonging to the first group to the nth group. Prioritizing items related to the predetermined number of items taken, a part other than the first group to the nth group is extracted as the (n + 1) th group from the acquired set,
The presenting unit sends an (n + 1) th response specifying an action that the user can take to each item included in the (n + 1) th group to the user in response to the (n + 1) th request. Present,
A recording medium characterized by the above. An acquisition unit for acquiring a set of items that the computer should present to the user;
A reception unit for receiving a first request from a user;
An extraction unit for extracting a part of the acquired set as a first group in response to the first request;
A presentation unit that presents to the user a first response that specifies an action that the user can take for each item included in the first group, in response to the first request;
A program that functions as
The accepting unit accepts a second request from the user presented with the first response via the presented first response,
In response to the second request, the extraction unit prioritizes an item related to an item for which the user has taken the action among the items belonging to the first group, and acquires the item. A part other than the first group is extracted from the set as a second group;
The presenting unit presents, to the user, a second response that specifies an action that the user can take for each item included in the second group, in response to the second request ,
For an integer n greater than or equal to 2,
The reception unit receives an nth response from the user who has been presented with an nth response designating an action that the user can take for each item included in the nth group via the presented nth response. n + 1) Accept the request,
In response to the (n + 1) th request, the extraction unit performs the action most recently by the user to whom the first response to the nth response is presented among the items belonging to the first group to the nth group. Prioritizing items related to the predetermined number of items taken, a part other than the first group to the nth group is extracted as the (n + 1) th group from the acquired set,
The presenting unit sends an (n + 1) th response specifying an action that the user can take to each item included in the (n + 1) th group to the user in response to the (n + 1) th request. Present,
A program characterized by that.

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