中性カテゴリーの位置効果に関する研究

抄録

This study was to investigate the intra-scale position effects of the neutral category for judgments of length. 41 kinds of five-category scales (basic scales) were created and clustered into 5 groups according to the intra-scale position of the neutral category. S made their judgments of the 14 lengths of horizontal lines by a five-category scale (41 kinds in total). The most important finding of this study was that the mean value of stimulus length judged by the neutral category varied significantly by shifting the intra-scale position of the neutral category. This result suggested that the intra-scale position of the neutral category was one of the most important factors to affect human decision-making process.