Fisher - 1989

Question 1

General

Answer 1

Field experiment - examine effectiveness of CI in practice.

Manipulate training on CI or not.

Question 2

Sample

Answer 2

16 police officers with minimum of 5 years experience.

Question 3

Method

Answer 3

• Pre training, all 16 detectives record 5-7 interviews over 4 months. crimes = robbery, purse snatching.
• 7 selected for CI training, X4 one hour sessions.
• POST TRAINING: 24 interviews were recorded by 7 trained detectives, 23 by 6 untrained (3 dropped out). & MONTHS.
  Shows development as there was a baseline, individual differences removed as measuring improvement.
• ONLY witness statements transcribed from tape recordings. Counted number of relevant objective statements. Irrelevant and opinionated statements were not scored.

Question 4

Findings

Answer 4

• 47% more information elicited from post-training interviews. when compared to pre-training interviews.
• Despite both groups scoring similarly before training, the trained detectives obtained 63% more information after training.
• in terms of accuracy, more than 94% of statements could be corroborated (2 people agree) by another witness/

CI is better, although not 100%

Question 5

Aim

Answer 5

Aim: Field test of CI. Enhancing the recollection of actual victims and witnesses of crime.