PSYC3315 Lecture Notes - Lecture 2: Iconic Memory, Sketchpad
Document Summary
Atkinson & shiffrin model (1968: 3 stores: flow of info is one way. Sensory memory: simultaneous entry of sensory info into consciousness, relatively limited capacity, very brief duration, 2 main sensory stores, iconic memory. Discrete visual sensory register that holds info for short time. Afterimage: ~4 items irrespective of how many are displayed. Partial report procedure: limits amount of info that must be reported, but whole array must be encoded, typically, 3 from each row (9 in total; 75%, echoic memory. Echo = brief unanalyzed memory of auditory stimulus: 0 ms delay: 60% correct, 250+ms delay: 90% correct. Spontaneously decays by mask / interfering material. Perception can rely on an icon or echo even if physical stimulus is gone. Stm: fragile storage (spans about 20 seconds) Distraction leads to forgetting: brown-peterson paradigm. 0 sec: ~100%, 18 secs: ~ <10: limited capacity - ~7 items / chunks, stm rehearsal >> ltm storage.
