Fisher: Cogntive Interview Flashcards
Describe the participants?
They were 16 detectives from the Robbery Division of Dade County, Florida. All were experienced, with a minimum of 5 years with the division.
What was the aim of Fisher’s study?
To test the cognitive interview of real witnesses in the field
What happened in the first phase of the experiment?
The detectives were asked to record a selection of their interviews using the standard techniques they normally used.
How long did the first phase take?
4 months
How many interviews did they record?
88
What happened after this?
The detectives were separated into two groups and one group was trained in CI techniques.
How long was the training?
Four, 60 minute sessions.
How many detectives finished the training?
7
Over how many months were more interviews collected by the groups?
7 months
Where were the interview analysed?
The university of California
Did the people analysing the data know which group conducted which interviews?
No - they were blind to the groups.
After training, how much more information did the trained detectives gain than the untrained detectives?
63%
How much more information did the trained detectives know before they were trained?
47%
What was the difference in accuracy of the two groups?
There was no difference.
What was the percentage of statements that were correct?
85%
