Research Progress Kieu Que Anh School of Knowledge, JAIST

Outline We present the current design creativity model of (Li et.al, 2007) and how it link to our work We present our current works on the research – The status of opinion summarization – How to collect data (what kind of reviewer) Strategy for selecting concepts using the WordNet similarity

Creative Design model [1] According to the psychologist Sternberg, personal creativity is related to a person’s intelligence, knowledge, thinking styles, personality, motivation, and environmental context. Therefore, it can be expressed as, K : knowledge I : intelligence TS: means thinking style P: personality M: motivation E : environment context For product innovation DM is design method ST is computer supporting tool U is uncertainty factor KB is knowledge based IR is information resource CAT is computer aid thinking

Design creativity model [1] Knowledge base and information Resource can be used with tools The authors emphasis the contribution of information technology Concept operators Can we use concept operators here?

My work and the link to this model Using design creativity for product innovation Using opinion extraction to support designer The link to design creativity model[1]? – Opinion extraction likes ST part in the creative product innovation model – Concept operators is DM part in the model

Our Model Step 3. Creating new concept in design creativity Obtain useful opinion text Obtain a list of products and their concepts WordNet Sentiment WordNet

Concept operators Collecting base concepts from outputs of opinion extraction – Product’s names – Positive features of the products – Negative features of the products Selecting an appropriate set of concepts using Word Net – Two dissimilar concepts are confidently selected (Taura et.al, 2005) – A concept with a greater number of association concept are confidently selected as base concepts (Nagai and Taura, 2006) Applying concept synthesizing, concept blending, analogy for two base concepts Collecting base concepts Select appropriate set of concepts Applying concept operators

Collecting base concepts Collecting concepts based on the main webs – Amazon.com and eopion.com, ebay.com – Indexing all product names and their attributes on a collection (such as dictionary) – Currently, we collect some types of products including: Ipod, mobile phone, Iphone, camera ( Digital Cannon).

Collecting negative and positive attributes Extract pros and cons features which are available on e- opinion. Using opinion extraction to extract more useful information about features of product

Our strategy for collecting review opinion – Those opinion documents from “top reviewers” Top Reviewers help customers find the best products on Epinions ( by writing high quality reviews in their category of expertise. Top Reviewers' reviews have received the highest ratings from Advisors in their category and the community at large. – The opinion documents from normal reviewers – We extract “pros” and “cons” information in each opinion documents for positive and negative features

Opinion Extraction Topic Identification Opinion Summarization Opinion Text opinion summary The opinion extraction method of (Zhan et.al, 2008) is implemented to extract useful information for a given opinion text. –We obtain a topic for each document using topic identification model – We use the Maximal Marginal Relevance method for opinion summarization Its idea: A sentence is included in a summary if it satisfies –Similar to the topic – Different from those sentences already in the summary. Current status: we have finish the tool and now evaluate its outputs –Our system can generate A set of user’s opinion document is summarized A list of positive features and negative features for each product

Current status of opinion extraction Topic Identification: It detects phrases appearing in many review documents We obtain all phrases which are frequently in the review document collection Temporary results ( confident ; topic ; locations (i.e document index) ) cell phone flip phones sound quality How to compute confident score? f (topic) is frequency N is number of document n is number of document f appear l is the length of f

Opinion summarization Using MMR (Maximal Margin relevant) method for summarizing a set of documents: For example: (the topic “sound quality” can be summarized using a set of documents defined by topic identification step: reception[+],sound quality[+] the reception and sound quality are top-notch. i can routinely talk on the phone in my house in the suburbs, which is an unaccustomed luxury, even with t-mobile service. size[+],weight[+] i like the size and weight of this little critter This example is obtained by performing on Nokia product review

System’s output We obtained a data of reviewer from eopinon.com and amazon.com – The product for selecting output include: Ipod and Nokia phone System’s output – “topic” are mentioned frequently in reviewer’s comments. – We then exact reviewer’s comments related to this topic. This information will be provided for designers sound quality </pattern

System’s output for top reviewer’s comments We found that in top reviewer’s comment, they usually indicate the advantage and disadvantage of products. The system can extract “advantage” and “disadvantage” information using some key-phrase like (cons, pros, “drawback”, etc) EX: – Pros: Great wireless applications, easy to use, video screen is great – Cons: Quick battery depletion, less memory than other iPods

Select two concepts We use WordNet similarity for selecting two concepts – The tool can be obtained at: – We also can use this tool online – It is used to measure the similarity between two concepts: we select the path-based method

WordNet Similarity 17 D=5 Lch Related (Money-Credit) = -log (2/10) = Root Medium of exchange Money Cash Coin Credit card measuring “closeness” of concepts in terms of their definitions using LCH method

Example Cell phone – Sharp – Color – Screen – Size – control Pen – Sharp – Color – Size – write A Phone is controlled by hand written The similarity of phone and pen using WordNet is youngster -travel a lot -young A Phone with flexible form The similarity of phone and youngster

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