Creating suspects in police interviews

In 3 studies, the idea was tested that an increase in a police officer's movements in an interview will lead to an increase in movements made by the suspect. This increase in movements may then be interpreted by the police officer as suspicious behavior. In Study 1, interviewees were interviewed by 1 male police officer who either made some movements or no movements at all. The movements made by the suspects were investigated. In Studies 2 and 3, police officers were asked to judge the credibility of interviewees who were interviewed by a lively or a nonlively interviewer. The results supported the process described.