Eye Witness Flashcards
System variable
Wells
Variable you can control
Line ups, the way the information is taken from the witness
Wells
1978
Lines ups
Accuracy depends on certain variables
System/estimator
Estimator variable
Wells
Line ups
Variables you cannot control eg stress, distance from event witnessed
Wells and Olson
2001 Sub categories Line ups General impairment Suspect bias
General impairment
Wells and Olson
Own race bias Meissner and Brigham
Age bias anastasi Rhodes
Suspect bias
Wells Olson
2001
The construction of the line up
How the line up is chosen
PACE
Police and criminal evidence act this is the guide lines and regulations
Simultaneous line up
Where all the suspects stands in a line and are all seen together
Sequential line up
Suspects are shown to the witness one at a time
What is the Yerkes-Dodson
Emotional stress
Emotional arousal= negative memory performance
Christianson
Disagrees saying the evidence for the Yerkes-Dodson law is inadequate
Deffenbacher 1994
Emotion and stress in recall
Added more cognitive to the theory said there is a 3 dimensional model
When cog anxiety is high we get a physiological stress response and we reach a point where we decrease in memory
Morgan 2004
Did the army study in stress affecting memory did interviews an interigater
Results showed there was equal results in both high and low stress levels
Valentine and mesout 2009
Used London dungeon in stress on memory for ecological validity
Results showed that participants did increase arousal- heart rates did increase participants who had greatest arousal recalled fewer correct details.
Fisher and geiselman 1992
Looked at interview techniques A cognitive interview free recall Go back See, hear, smell, touch Help to ensure accurate information is recalled