Impression and Suitability of Q&A Statements through Factor Scores Using 2-Gram

In order to solve the mismatches between the intentions of questioners and respondents at Question and Answer (Q&A) sites, nine factors of impressions were obtained through impression evaluation experiments. Through multiple regression analysis, factor scores were then estimated using feature values of statements. The factor scores obtained were subsequently used for finding the respondent who would be expected to appropriately answer a question. However, this method largely depended on the syntactic information extracted through morphological analysis. Thus, it was also partially shown that N-gram was also applicable as an alternative method. In applying N-gram, estimation of factor scores has been realized so far. Therefore, in this paper, using the distances between the factor scores of Q&A statements, whether applying N-gram would also be applicable to assessing impression and suitability for the purpose of detecting the respondent who can appropriately answer a question is inspected. As a first phase of using N-gram, in this analysis, 2-gram has been tentatively utilized. The analysis result using 2-gram has shown that a similar tendency as the previous analysis employing Syn-Info is observed. It has also been shown that users with sufficient knowledge in specific categories can be thought as appropriate respondents.