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PSYC39H3 (201)
Chapter 5

Chapter 5 notes

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University of Toronto Scarborough
David Nussbaum

PSYC39 Chap 5: Eyewitness Testimony Stages of Memory 1. PerceptionAttention Stage 2. Encoding Stage 3. Short-term memory 4. Long-term memory 5. Retrieval Stage Recognition memory: determining whether a previously seen item or person is the same as what is currently being viewed Laboratory stimulation Laboratory stimulation study is the most common paradigm used to study eyewitness issues Using a lab stimulation, an unknowing participant views a critical event, and is unaware they will be tested on questions about the event later on Independent Variables (there are many ) o Estimator variables: variables that are present at the time of the crime and cannot be changed (age of witness, lighting, presence of weapon) o System variables: variables that can be manipulated to increasedecrease eyewitness accuracy (type of procedure used by police to interview witness) Dependent Variables (only 3) o Recall of the eventcrime Open-ended recall: witnesses asked to either write or orally state all they remember about event without officer asking questions (also called free narrative) Direct question recall: witnesses are asked a series of specific questions about the crime or the culprit o Recall of the culprit Open-ended recall and direct question recall can occur for culprit info as well o Recognition of the culprit Recall can be examined for the following o Amount of info reported o Type of info reported o Accuracy of info reported For recognition of the culprit, the typical recognition task is a lineup Clothing lineups, in which the witness examines culprits clothing is also used Recognition response can be examined for: o Accuracy of decision o Types of errors made Lineup: set of people presented to witness, who in turn must state whether the culprit is present and if so, which one Recall memory Primary goal for an officer interviewing an eyewitness is to extract from the witness a complete and accurate report of what happened www.notesolution.com
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