Memory Booklet 2 Flashcards
define eye witness testimony
-the ability of people to remember details of the events, such as accidents and crimes which they themselves have observed
-accuracy of ewt can be affected by factors such as misleading information, leading questions and anxiety
define anxiety
-a state of emotional and physical arousal
-the emotions include having worried thoughts and feelings of tension
-physical changes include an increased heart rate and sweatiness
describe the procedure of the Johnson and Scott study
-participants invited to take part in a fake psychology study
-while in waiting room
-group 1 overheard a heated argument in the next room, a crash of equipment and a man holding a paperknife
-group 2 overheard a disagreement about lab equipment in the next room, and a man holding a pen
-each participants asked to identify the man from 50 photos
aim of Johnson and Scott study
investigate the effect of a weapon which would cause anxiety on the accuracy of eye witness testimony
findings of Johnson and Scott study
-group 1 less accurate in selecting the man from the photos in comparison to the control group
-anxiety decreased effectiveness of eye witness testimony due to weapon focus
describe the yuille and cutshall study
-13/21 witnesses of a shooting where one person was killed were interviewed 4-5 months after
-gave eye witness accounts
results of yuille and cutshall study
-highly accurate accounts
-little change in accuracy of recall
-resisted leading questions
what does the inverted U theory state
-performance will increase with stress but only to a certain point
-optimal anxiety= maximum accuracy
explain deception in Johnson and Scotts study
-believed they were in waiting room when experiment was already taking place
-needed to deceive to avoid demand characteristics for valid results
-participants would have been debriefed
-some may not have agreed to take part if they were aware of the weapon and anxiety
describe the procedure of loftus and palmers experiment
-5 groups of 9 participants watched a video of a car crash
-asked a specific question about the speed of the cards
-manipulated the verb in the question
what did loftus and palmers sample consist of
45 american students
which verbs did loftus and palmer use
smashed
collided
bumped
hit
contacted
results of loftus and palmer experiment
verb smashed = 40.5 mph
verb contacted = 31.8mph
-accuracy of eye witness testimony affected by leading questions
define misleading information
-incorrect information given to the eyewitness usually after the event
-it can take many forms such as leading questions and post event discussion
define leading question
-a question which because of the way it id phased, suggests a certain answer