Publications by authors named "April Pilipenko"
Endogenous shifts of spatial attention toward an upcoming stimulus are associated with improvements in behavioral responses to the stimulus, preparatory retinotopic shifts in alpha power, and changes in ERPs. Although attentional modulation of several early sensory ERPs is well established, there is still debate about under what circumstances attention affects the earliest cortical visual evoked response-the C1 ERP component-which is putatively generated from afferent input into primary visual cortex. Moreover, the effects of spatial attention on the recently discovered ERP signature of evidence accumulation-the central parietal positivity (CPP)-have not been fully characterized.
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- Perception involves both external stimuli and internal states, with ongoing debate about which internal factors influence it and how.
- The study examined how spontaneous alpha-band brain activity and pupil fluctuations affect visual detection and confidence, revealing distinct roles for each: low alpha power leads to more frequent false alarms, while larger pupil sizes enhance detection sensitivity at higher contrasts.
- The findings suggest that low alpha activity increases detection and confidence through an additive effect, while arousal linked to pupil size modulates sensitivity; both factors independently influence visual perception.