Individual differences in resting-state pupil size: Evidence for association between working memory capacity and pupil size variability

摘要: Dynamic non-luminance-mediated changes in pupil diameter have frequently been shown to be a reliable index for the level of arousal, mental effort, and activity locus coeruleus, brainstem's noradrenergic arousal center. While pupillometry has most commonly used assess particular psychological states or engagement cognitive tasks, some recent studies found relationship between average resting-state (i.e. baseline) sizes individuals' working memory capacity (WMC), indicating that individuals with higher WMC on larger pupils than relatively lower WMC. In present study, we measured size continuously 212 participants during rest while fixating) estimated all by administering Letter-Number Sequencing (LNS) task from WAIS-III. We were unable replicate relation However, novel finding was associated variability size. The results are relevant current debate role capacity.