The purpose of the present work was to identify general problem solving skills that underlie the production of insight. One hundred and eighteen participants completed insight problems, analogies, series-completion problems and the Remote Associates Test. Scores on all measures were related to performance on the insight problems (Pearson r's ranged from .31 to .47, p < .008). These findings are consistent with the notion that the abilities to apprehend relations and fluency of thought are involved in insightful problem solving.