In this study, we examined the effect of the categorization in concept combination. For this purpose, we used the alternative categories task (ACT), which is training to generate ad hoc categories. A comparison of high and low concept relevance indicated that lower relevance improved each production’ s creativity, originality, validity, and interestingness scores. The results also showed that the ACT group’ s creativity and originality scores improved. More analyses to examine the effects of ACT suggested that it may have the effect of promoting a different perspective on a concept. Alternatively, it may create a unique category that helps to overcome resistance to submitting original work to others.
