PSYC 1100 1st Edition Exam 2 Study Guide Lectures 20 21 Lecture 20 April 14 Human Memory stage theory Long Term and Short Term Memory Working Memory Duration LTM relatively permanent STM seconds to minutes Storage Capacity LTM infinite STM 7 2 chunks organized packets of information Flow of information in memory stimulus STM Rehearsal LTM Two kinds of rehearsal Maintenance holds info in STM Elaborative moves info to LTM Lecture 21 April 16 Serial Position Effect in Free Recall Task read 20 words one at a time recall in any order Primacy effect early part of list recalled better than middle recalled from LTM o Reduce primacy present words faster Recency Effect last part of list recalled better than middle recalled from STM o Reduce recency delay between 20th work and recall Further Differences between STM LTM Psychological Code o STM phonological based on speech sounds confuse boat with coat o LTM semantic based on meaning confuse boat with ship Neural Code o STM dynamic pattern of activity among a group of cells o LTM structural pattern of connections within a group of cells o Trace consolidation is what goes on during elaborative rehearsal a memory trace changes from a dynamic to a structural pattern Amnesia interruption of consolidation process Retrograde Amnesia for events BEFORE trauma Anterograde Amnesia for events AFTER trauma Forgetting o STM displacement and or decay o LTM misplacement and or retrieval failure Proactive interference old info affects new Retroactive interference new info affects old
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