STM_1 - Short-Term Memory (STM) Information Processing...

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1 Short-Term Memory (STM) Information Processing Model Information Processing Model: Storage boxes SENSORY STORE (sensory memory) SHORT TERM MEMORY LONG TERM MEMORY INPUT Sensory Store Large capacity Extremely short duration Visual: Iconic store (1/4 sec.) Auditory: Echoic store (a couple sec.)
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2 Review: Sperling’s expt. Display flashes briefly. When Ss try to report the whole array (whole report), they report 3-4 items. If just try to report just the single row cued after the display disappears (partial report), they can still report 3-4 items. This shows: *Everything* was originally in iconic memory. Icon fades too fast to retrieve it all. Information Processing Model: Large capacity Short duration SENSORY STORE (sensory memory) SHORT TERM MEMORY INPUT decay attention Limited capacity Rapid loss of info Acoustic coding (typically) Short Term Memory Limited capacity Immediate memory span is typically considered to be 7±2 items (George Miller) How much can you keep in STM? 3 5 9 6 7 0 6 5 1 8 7 6 0 6 4 3 2 Short Term Memory Items are held in STM for only 20-30 sec. unless you rehearse them e.g., remembering a phone number long enough to dial it
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3 Rapid forgetting from STM: Why? Large capacity Short duration SENSORY STORE (sensory memory) SHORT TERM MEMORY INPUT decay attention Limited capacity Rapid loss of info Acoustic coding (typically) ? Short Term Memory Ss had to remember and report 3 letters Study: C J P Retention interval: Count back from 834 by 3’s. “834, 831, 828, 825, 822, 819…” Test (light goes on): Report the letters. “C J P”
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STM_1 - Short-Term Memory (STM) Information Processing...

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