A male advantage for spatial and object but not verbal working memory using the n-back task

Area of Science:

• Cognitive Neuroscience
• Human Psychology
• Neuroimaging Research

Background:

• Sex-related differences in working memory performance and neural substrates are documented.
• High cognitive load tasks, like the n-back paradigm, are susceptible to sex-based performance variations.
• Sex differences in task performance can act as a confound in neuroimaging studies.

Purpose of the Study:

• To investigate sex-related differences in verbal, spatial, and object working memory using the n-back task.
• To determine if males or females exhibit an advantage in specific high cognitive load working memory domains.
• To highlight the importance of considering sex as a factor in working memory research.

Main Methods:

• Eighteen male and 18 female undergraduates participated.
• Participants completed verbal, spatial, and object versions of the high cognitive load n-back task.
• A mixed ANOVA analyzed performance accuracy with Sex as a between-subjects factor and Condition as a within-subjects factor.

Main Results:

• Males demonstrated significantly higher accuracy than females on spatial and object n-back tasks.
• Performance was equivalent between sexes on the verbal n-back task.
• The expected female advantage in verbal working memory was not observed with this task.

Conclusions:

• This study supports a male advantage in high cognitive load spatial and object working memory.
• The findings suggest that the n-back task may elicit different performance patterns based on sex.
• Researchers should consider sex as a crucial variable influencing n-back task performance and interpret neuroimaging findings accordingly.