必要性および十分性がWason選択課題における主題化効果・視点効果に与える影響

抄録

This study examined whether necessity and sufficiency relations predict the thematic material effect and the perspective effect of the Wason selection task. In the experiment, participants were asked to answer the Wason selection task and the necessity and sufficiency evaluation tasks. These tasks were consisted of 4 versions of conditional statements that were an abstract letter-number rule, a deontic drinking age rule, a day off rule with employer's perspective and a day-off rule with employee's perspective. It was observed that contents of conditional statement determined the participant interpretation of necessity and sufficiency relations, while the perspective which participants took didn't affect on the necessity-sufficiency interpretation. The results also showed that participants selected cards in accordance with their interpretation of necessity and sufficiency relations. These dates support the view that interpretation of necessity and sufficiency relations of the conditional statement affects the performance of conditional inference tasks.