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Materials
Hindi adaptation of Eysenck Personality Inventory (Thakur & Thakur, 1986) based on Eysenck Personality Inventory (Eysenck & Eysenck, 1964) to classify the subjects into personality types of extravert and introvert
Procedure
Phase-1. Exposure to the witnessed event
Phase-2. Introduction of post-event information
Phase-3. Memory test
Personality Type
Types of Post-Event InformationConsistent Misleading No Overall
Mean SD Mean SD Mean SD Mean SD
Extravert 15.60 1.58 9.50 1.43 11.40 1.50 12.17 2.97
Introvert 17.20 1.1.48 5.40 1.20 8.50 1.43 10.37 5.25
Overall 16.40 1.70 7.45 2.50 9.95 2.10 11.27 4.33
Source of Variation SS df MSS F
p Level of
Significance
A(Types of Post-Event
Information)853.03 2 426.52 206.01 .0001
B(Types of Personality) 48.60 1 48.60 23.47 .0001
A B 90.30 2 45.15 21.81 .0001Within Treatments
(Error)111.80 54 2.07
Total 1103.73 59
Materials
Hindi adaptation of UWIST Mood State Adjective Checklist (UMS; Mathews, Dwivedi, A.P. Singh, Srivastava, Arora and I.L. Singh, 1995)
A video clip of 3 minutes and 15 seconds duration as the eyewitness event depicting a riot, as used in Experiment-1
A memory test consisting 20 items regarding details of the event
Two types of post-event information (The consistent post-event information correctly described the event and items given in the test. Misleading post-event information employed some misleading cues about the event
Arousal States
Types of Post-Event InformationConsistent Misleading No Overall
Mean SD Mean SD Mean SD Mean SD
Energetic Arousal 17.00 1.15 11.90 1.29 13.10 1.00 14.00 2.48
Tense Arousal 14.90 1.20 4.50 1.27 7.50 1.18 9.00 4.60Hedonic
Tone 16.90 1.10 9.80 1.48 11.20 1.32 12.63 3.67Anger /
Frustration 14.10 1.20 5.70 1.16 9.10 1.60 9.63 3.74
Overall 15.73 1.70 8.00 3.28 10.23 2.48 11.31 4.14
Source of Variation SS df MSS F
p Level of
Significance
A(Types of Post-
Event Information)1271.67 2 653.83 404.65 .0001
B(Arousal States) 518.69 3 172.90 110.03 .0001
A B 83.53 6 13.92 8.86 .0001
Within Treatments (Error)
169.70 108 1.57
Total 2043.59 119
Misleading post-event information led the witnesses to poor eyewitness memory retentionExtraverts were more accurate eyewitnesses than were the introverts
Introverts performed better than the extraverts with consistent post-event information, while extraverts performed better when given misleading and no post-event informationHigh energetic arousal and hedonic tone subjects retained more event details than the high tense arousal and anger/frustration subjects
High tense arousal and anger/frustration subjects’ memory score dropped sharply when they were given misleading post event information in comparison to the high energetic arousal and hedonic tone subjects
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