A working memory task reveals different patterns of impulsivity in male and female college students.
Impulsivity is an important personality trait that affects people's lives every day. Because of the complicated structures and various measurements of impulsivity, the conclusion that whether there were gender differences on impulsivity remained controversial. In our study, we used delay discounting and probability discounting to measure impulsive choice and employed stop signal reaction time task (SSRT) to measure impulsive action within the same subjects. No inherent gender differences were found, either on impulsive choice or on impulsive action. However, after adding a working memory (WM) task, we found an interaction between gender and WM: males made more impulsive choices in the delay discounting task, but females remained no change, and this only occurred when the reward amount was large; in the SSRT, the males showed better inhibitory control under the WM load condition, but females did not. These results demonstrate that gender difference does not exist on impulsivity biologically, but the increased working memory load could affect the gender's sense of delay gratification and the ability of inhibitory control differently. These findings can contribute to the studies of gender differences on impulsivity and draw attention to the need for further research that gender factors should be considered more carefully when exploring the effects of working memory.
['Mei|Xiaolin|X|', 'Tian|Lin|L|', 'Xue|Zhaoxia|Z|', 'Li|Xinwang|X|']
D000328:Adult D002755:Choice Behavior D065786:Delay Discounting D005260:Female D006801:Humans D007175:Impulsive Behavior D008297:Male D008570:Memory, Short-Term D011930:Reaction Time D012201:Reward D012727:Sex Characteristics D055815:Young Adult
Working memory Gender Impulsive choice Impulsive action