PSYC55H3 Lecture Notes - Electrophysiology, Electrodermal Activity
Document Summary
There is a capacity limit to attention- comes from limited processing by the brain. Anything below the bottleneck, will have limited attention capacity. Sensory info comes in registered-has a limited capacity- gating mechanism filters out unnecessary info] Some argue bottleneck happens early on and others later. Sensory input- cortical areas process info- after perceptual analysis, brain carry out semantic analysis- to executive function and decision making. Broadbent argued this happens very early, right after sensory input. Late theorist argues- filtering doesn"t happen until semantic analysis. Dichotic listening paradigm- different streams of info in each ear. Subject is repeating what they are hearing in left ear. Filtering of info happens very early such that unattended info doesn"t reach semantic stage. Von wright- first stage- words with electric shock- played these words in unattended stream- If you play two different info in each ear- unattended ear-subjects couldn"t say what was playing they still show galvanic skin response to these words.
