Improvement of Estimation Accuracy of Factor Scores from Feature Values of Statements

In order to avoid the problem of mismatch between the questioner and the respondent, we have conducted impression evaluation experiment and nine factors are obtained as a result. Then factor scores of any other statements are tried to be estimated by using multiple regression analysis. This result, however, shows that the estimation accuracy was insufficient and that the ninth factor could not be obtained. To improve the estimation accuracy, some feature values, such as word image ability and closing sentence expressions are introduced in this paper. The result of the analysis shows that the estimation accuracy is drastically improved and that closing sentence expressions as well as style or content of sentences are significant for estimation accuracy.