ABSTRACTThe present study was designed to investigate the relationship between intra‐and inter‐individual differences in arousal level and performance on both critical flicker fusion frequency and figural reversal tasks. Forty male undergraduateSs were used. Electrical skin conductance was used as the indicant of arousal level. For the intra‐individual comparisons white noise was used to increase theSs’arousal levels. Significant invertedU‐shaped relationships were found between both flicker fusion thresholds and rates of figural reversal and skin conductance between individuals. A significant curvilinear relationship was found between rates of figural reversal and level of conductance within individuals. No significant curvilinear relationship was found between flicker fusion thresholds and level of conductance within in