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Guilford and his co-workers (4, 13) have suggested that the frequency of uncommon but relevant responses may be employed as one of several objective measures of originality. It has also been suggested that originality measured in this fashion may be related to the ability to solve "insight" problems (4). The principal purpose of the first experiment reported here was to determine whether such a relationship could be obtained.According to S-R interpretations of problem solving (2, 7, 9) an S enters a problem situation with a hierarchy, or hierarchies, of responses which differ in their tendency to occur in that situation. A problem, by definition, cannot be solved by the dominant responses, the responses with the greatest probability of occurrence. Original problem-solving behavior therefore occurs through the arousal of responses relatively low in S's response hierarchy.If this analysis is essentially correct, then the problem of increasing originality is one of increasing the disposition to produce uncommon but relevant responses. A number of training procedures may be employed to evoke uncommon responses and

Effects of syntactical structure on rote learning of verbal strings were studied by introducing orthogonally two components, grammatical endings and function words, into an initial string of eve syllables. With both components present, the