Vrig and Mann - detecting lies
- test police officers ability to detect deception
- field experiment
- 52 uniformed officers
- lecture on interviewing suspects - 8 clips from videotaped press conferences where people were asking for help in finding relatives.
- 5 clips people had been later convicted of the crime
- watched a clip and answered 4 questions: is the person lying? how confident of that are you? can you understand what the person is saying? are there any behaviour cues that you spotted?
- 49/52 officers no better at detecting lies than if they were guessing
- only 3 officers were right 80% of the time
- age, length of service and experience had no effect
- men better than women
Inbau - interrogation techniques
- direct positive confrontation - suspect told directly that they are believed to have committed the offence
- theme development - interrogator suggests to the suspect possible reasons for the crime, which minimise involvement or culpability. Aim is to show sympathy making it easier to admit guilt
- handling denials - interrogator interrupts denials to prevent suspect gaining the psychological advantage
- overcoming objections -…