G543 - Interviewing Witnesses - Loftus And Loftus Flashcards Preview

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Flashcards in G543 - Interviewing Witnesses - Loftus And Loftus Deck (18)
1

What type of experiment was used?

Lab experiment

2

How many participants were there? What was their occupation? How were half of them recruited? How were the other half recruited?

36 students from Washington university aged 18-31.
Half recruited through advertisement and paid $3.50
Half participated for extra credit in their psychology class

3

How many conditions were there?

2

4

What were the two conditions?

Critical slide being the gun slide or the cheque slide

5

How many slides were shown for each of the groups? For how long?

18 for 1.5 seconds each

6

What did the slides show?

People queuing in a fast food restraint

7

What happens in the critical slide for the control group?

Person B hands the cashier a cheque

8

What happens in the critical slide for the experimental group?

Person B pulls out a gun on the cashier

9

What were the students told it was a study in?

Practical inference

10

How was the dependant variable measured?

By a 20 item questionnaire

11

What were the participants also given after the 20 item questionnaire?

A line-up of 12 head to shoulder photos in a random sequence

12

What were the participants asked to do with the photo line up?

Rate how confident they were on a scale of 1 to 6

13

What was chance performance on the line-up?

8.5%

14

What percentage of the control group chose the correct person B?

38.9%

15

What percentage of the experimental group chose the correct person B?

11%

16

What was the eye fixation data?

Average fixations on the gun - 3.72
Average fixations on the cheque - 2.44

17

What reason did Loftus and Loftus give for the experimental group having more difficulty picking the suspect from the line-up?

They spent too long looking at the weapon

18

What did they aim to provide support for?

The weapon focus effect when witnessing a crime

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