Cognitive Content Generation for Healthy Ageing

From the viewpoint of preventing dementia, balanced meal, moderate exercise, intellectual activities and social interaction are important. We considered shopping activities were proper to encourage those factors because the activities were intellectual in human daily activities. In this paper, we are going to construct Shopping Game and discuss how to evaluate the activities in the game from the viewpoint of preventing dementia. In addition, we will discuss content generation in Shopping Game.


INTRODUCTION
Dementia is a general term for a decline in mental ability enough to interfere with daily life. Alzheimer's is the most common type of dementia. Otake [1] pointed out balanced meal, moderate exercise, intellectual activities and social interaction were important from the viewpoint of preventing dementia. In addition, as people get older, physical activities decrease because of retirement, bereavement, and so on [2].
We considered shopping activities were proper to encourage those factors because the activities were intellectual in human daily activities. Shopping activities are one of the daily activities and people should do that usually by themselves. Some people visit a real grocery store and the others use online store or delivery service (e.g., COOP). In addition, convenient stores are visited not only by the young and also by the elderly in Japan [3], so shopping activities are one of the essential daily activities for many people. Therefore, in the situation of shopping activities, we thought we could activate intellectual activities to prevent dementia. In addition, we have to take psychological stress into consideration. One of the solutions is gamification. Gamification is a method which applies some ingredients or ideas in the field of game to the other field [4]. For example, gamification is used for rehabilitation or learning support.
In this paper, we construct Shopping Game and discuss how to evaluate the activities in the game from the viewpoint of preventing dementia. In addition, we will discuss content generation in Shopping Game.

METHOD -SHOPPING GAME
In many researches about consumer behavior [5][6][7], they usually observe consumers in a real grocery shop. However, this way of observation may be difficult for observers and for participants. Abe said that "The way of observation in my research requires lots of time and labor, so it is difficult to collect lots of shopping activities data. " [7]. Accordingly, we developed Shopping Game. In addition, especially in urban areas in Japan, there are many people who do not have any grocery stores around their houses [8]. So online shopping services have also been demanded.
In this game, user can move a character and walk around virtual store ( Figure 1). Upper part means a basket which the character has and lower part means a floor in the virtual store. If user wants a particular item, he/she can drag the picture of item from floor to basket. On the other hand, if user stops purchasing an item, he/she can drag the picture of item from basket to floor. There are many areas in the store, for example, vegetables, bakery or snacks. When a character approaches a certain area, user can see information on each item, which information fundamentally consists of name, amount and price.
Participants were 34 people, and 12 of them were house-workers, 11 were boarders and 11 were home-students. They can play the game depending on their purposes. They often told us some comments. So we recorded their activities and utterances. Figure 2, participant (A) has a stickle preference to a specific item (milk-X). You can see that the specific item

A B S T R A C T
From the viewpoint of preventing dementia, balanced meal, moderate exercise, intellectual activities and social interaction are important. We considered shopping activities were proper to encourage those factors because the activities were intellectual in human daily activities. In this paper, we are going to construct Shopping Game and discuss how to evaluate the activities in the game from the viewpoint of preventing dementia. In addition, we will discuss content generation in Shopping Game. activated utterances. In addition, a choice of milk was caused by a choice of meat. This participant showed her ability of budget management Participant (B) was house-worker and (C) was her daughter (Figure 3). They discuss which vegetables are good for yakisoba. In this case, they could not find a noodle for yakisoba in the end, so they planned to purchase a noodle at the other shop.
When our participants play the game, they showed some types of utterances/conversation. We summarized intellectual activities of our participants into Table 1. This game will be used as the following purposes. To prevent dementia, cognitive functions would be trained. In the future, evaluation of cognitive functions would be also added. The game would be useful to activate a communication. Otake said "The shortage of social communication is one of the main factor of dementia" [9]. So we plan to make a situation where some users can simultaneously play the game to communicate with each other.

DISCUSSION -SHOPPING GAME WITH CONTENT GENERATION
In the future, Shopping Game has to change its contents automatically depending on its user. Some functions will be added to the Shopping Game. From the viewpoint of cognitive training, out of stock and change of price are needed. In addition, it is good for user to be sometimes shown some special items with discount or with best season. Furthermore, other shoppers would influence on user Recently, healthy ageing has been an important concept to decrease risk of disease, care independence or any other troubles. For example, WHO has recommended healthy lifestyle to younger and middle-aged people. In addition, a concept "ME-BYO" which was originally generated in oriental medicine has been accepted around the world. This concept means inarticulate zone between health and disease and encourages healthy life style. So preventing dementia is the problem not only for the elderly but also for the young or middle-aged people. We have to enhance our game taking diversity of users into account.

CONCLUSION
In this paper, we constructed Shopping Game for healthy ageing and discussed how to evaluate the activities in the game from the viewpoint of preventing dementia. We conducted observations to determine if the shopping activities were really intelligent activities and we showed some examples of utterances/conversations in shopping activities. Our participants talked actively, for example, when they found their favorite items in a grocery store, when they complain about price and when they let the other participants know useful information. Accordingly, we think we can activate utterances/conversations if we give a topic about shopping to people in Shopping Game. In the future, we consider it will be also used for evaluation of cognitive functions so we have to make a criteria for users' performance.

Class Symbol Activity
Notice n1 To simply notice an item n2 To find an item which a shopper wanted nc To notice an item which a shopper has already noticed Result r + 1 To put an item into a shopping cart r0 Not to put an item into a shopping cart r − 1 To move an item from a shopping cart to a selling zone Search s1 To search some items in a store s2 To search some items in a selling zone s3 To notice or find a selling zone s4 To arrive at a selling zone s5 To move toward a checkout counter Knowledge k1 Price or market price of an item k2 Producing area of an item k3 The best season for an item k4 Freshness of an item k5 Use of an item k6 Characteristics of an item k7 Family's preferences k8 Arrangement in a store k9 Stock in a store k10 Evaluation on a store Planning p1 To check a shopping cart p2 To check sequence during shopping activities p3 To check a shopper's plan p4 To consider a shopper's plan p5 To adjust balance of items p6 To manage a shopper's budget p7 To recall stock in a shopper's house p8 To predict stock in a shopper's house Idea i1 To compare an item with the others i2 To combine an item with the others i3 To use an item as other purpose i4 To substitute an item for the other item

Dr. Akinori Abe
He received an M.E. and Doctor of Engineering (PhD) from the University of Tokyo in 1988 and 1991 respectively. His main research interests are abduction, analogical reasoning, data mining, Chance Discovery and language sense processing (rather emotional aspects of language processing