G543 - Interviewing Suspects - Vrijj And Mann Flashcards
What methodology did they use?
Filed experiment
How many police officers were in the sample?
99
Where were they from?
Kent
How many males and how many females were there in the sample of police officers?
75m 24f
What was their mean age?
34.3
How many detectives were there in the sample?
78
How many trainers were there in the sample?
8
How many traffic officers were there in the sample?
4
How many uniform response officers were there in the sample?
9
How many video clips did participants see? Of how many suspects?
54, 14
What did the video clips show?
The suspects’ head and torso so expression and movement were visible
What did the participants do after they had watched the video clips?
Filled out a questionnaire about their experience in detecting lies
What did they do after they had filled out the questionnaire?
They then indicated whether they though the suspect was lying or telling the truth, and how confident they were in their decision
What were they finally asked to do after indicating a lie or truth?
List the cues they had used to detect the lies
Levels of accuracy were significantly greater than what?
Chance (50%)
What was there no significant difference between?
Mean lie accuracy and mean truth accuracy
What did experience in interviews correlate positively with?
Truth accuracy
What was the most frequently mentioned cue to detect lying?
Gaze
What the second most frequent cue used to detect lies?
Movements
What was also mentioned in cues?
Vagueness, contradictions in stories and fidgeting
What did levels of accuracy found in this study exceed?
Those found in other studies?
What are the results found in this study highest for?
A group of ordinary police officers
What do good lie detectors rely more on?
Story cues, than the more stereotypical belief that liars can be detected by covering the mouth or fidgeting
What can police officers do above the level of chance?
Detect liars
What do police officers often pay attention to?
The wrong cues
What did they aim to test?
Police officers’ ability to distinguish truths and lies during police interviews with suspects
