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