THE RELATIONSHIP BETWEEN CATEGORY LEARNING AND VERBAL CODING
 
Tanaka, D., University of Tokyo, Japan
 
This study examined the relationship between category learning and verbal coding. Previous research has shown that the objects in the same category become more similar to each other and the objects in different categories become increasingly dissimilar through category learning. This study was used letter matrices as exemplars of two arbitrary categories. Experiment 1 investigated the relationship Between category learning and the altering object representations in memory. Specifically, experiment 1 measured the difference of Similarity ratings through category learning at two conditions, a pair of exemplar appeared simultaneously and two exemplars appeared one by one. In sort, at the latter condition, Subjects had to memorize an exemplar. If category learning effects object representations in memory, fluctuations of similarity ratings through category learning at the latter condition was larger than that at the former condition. The result of experiment 1 showed fluctuations of judged similarity ratings through category learning caused only at a condition, exemplars appeared one by one. This result suggested that Category learning effects object representations in memory. Experiment 2 investigated the relationship between category learning and verbal coding using articulatory suppression. The result of experiment 2 showed fluctuations of similarity ratings through category learning observed in experiment 1 was vanished by articulatory suppression. These results of experiment 1 and 2 suggested subjects alter object representations in memory using verbal coding.