Hand preference and differences in the ability to solve insight problems, the self-deception, and the extremeness of political attitudes

OBJECTIVE: Inconsistent handers are characterized by higher level of interhemispheric interaction and therefore also by better access to the right hemisphere functioning. We aimed to extend previous research concerning handedness and proposed that inconsistent handedness could be also related to the superior ability to solve insight problems, a lower level of self-deception, and to holding less extreme political attitudes.DESIGN: 218 people were asked to complete a battery of relevant questionnaires and tasks.RESULTS: Inconsistent hander solved more insight problems and scored lower on a measure of extremism of political attitudes than consistent handers, but there was no significant difference in the level of self-deception.CONCLUSION: Results are generally in line with previous findings concerning handedness and further generalize them to topics, where only the role of the right hemisphere or the processes supposed to depend on it have been studied yet.