Overtly prompting people to “think in opposites” supports insight problem solving

This study aims to investigate the hypothesis that “thinking in opposites” might facilitate insight problem solving. For example, if the image relating to a problem is oriented horizontally, it may be that making it vertical makes it easier to see the solution. We focus on visuo-spatial insight problem solving and study four conditions (training vs. hint, overt vs. covert identification of opposites) which differ in terms of the participants’ awareness of how considering the opposites relating to a problem might lead to possible representational transformations which would help them in their search for the solution. The training condition was associated with a greater proportion of correctly solved problems. Participants who found the solution after training also made fewer attempts and did it in a shorter time. Furthermore, they referred more frequently to the instructions they had received to use opposites and made more use of the opposites they had listed in their initial exploration (overt listing condition). Overall the results show that suggesting to the participants that they “think in opposites” worked better when it was proposed as an explicit, systematic strategy.