Neural mechanisms of general fluid intelligence.

摘要: We used an individual-differences approach to test whether general fluid intelligence (gF) is mediated by brain regions that support attentional (executive) control, including subregions of the prefrontal cortex. Forty-eight participants first completed a standard measure gF (Raven's Advanced Progressive Matrices). They then performed verbal and nonverbal versions challenging working-memory task (three-back) while their activity was measured using functional magnetic resonance imaging (fMRI). Trials within three-back varied greatly in demand for control because differences trial-to-trial interference. On high-interference trials specifically, with higher were more accurate had greater event-related neural several regions. Multiple regression analyses indicated lateral parietal may mediate relation between ability performance (accuracy despite interference), providing constraints on mechanisms gF.