PS267 Lecture 13: Lecture 13 – Attention
Document Summary
Lecture 13 attention fmri study shows spatial attention in the lgn. The fact that difference found in lgn shows that attention can modulate flow of information from thalamus even before it reaches the visual cortex: reflexive spatial attention: Activated by conspicuous stimuli in the environment (more obvious, noticeable, catch attention even more) Studied using reflexive cueing: examine how irrelevant stimuli affect reaction time to respond to a target. Stare at +, respond as fast as possible to target when it appears somewhere on screen, irrelevant flash of light presented milliseconds before real target. Result: faster rt if flash close to and just before target. Erp data from people performing a reflexive cueing task show similar pattern. Isi: inter-stimulus interval (time between cue and target) Short isi: p1 wave enhanced by reflexive attention when cued to correct location, faster reaction time.
