G543 - Interviewing Witnesses - Loftus And Loftus Flashcards

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1
Q

What type of experiment was used?

A

Lab experiment

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2
Q

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

A

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

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3
Q

How many conditions were there?

A

2

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4
Q

What were the two conditions?

A

Critical slide being the gun slide or the cheque slide

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5
Q

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

A

18 for 1.5 seconds each

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6
Q

What did the slides show?

A

People queuing in a fast food restraint

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7
Q

What happens in the critical slide for the control group?

A

Person B hands the cashier a cheque

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8
Q

What happens in the critical slide for the experimental group?

A

Person B pulls out a gun on the cashier

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9
Q

What were the students told it was a study in?

A

Practical inference

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10
Q

How was the dependant variable measured?

A

By a 20 item questionnaire

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11
Q

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

A

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

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12
Q

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

A

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

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13
Q

What was chance performance on the line-up?

A

8.5%

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14
Q

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

A

38.9%

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15
Q

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

A

11%

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16
Q

What was the eye fixation data?

A

Average fixations on the gun - 3.72

Average fixations on the cheque - 2.44

17
Q

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

A

They spent too long looking at the weapon

18
Q

What did they aim to provide support for?

A

The weapon focus effect when witnessing a crime