Abstract
The study looks at a relationship between nonverbal lie detection and stereotypical evaluations based on appearance. Police officers in the Czech Republic (n=197) evaluated veracity statements of suspects in 21 videos from real crime investigations, based on the nonverbal behavior.
Speech was modified, to that the content was unrecognizable, yet the voice characteristics were preserved. Various types of suspects, that might have induced stereotypical believes, were presented.
Results confirm previous findings that respondents have a tendency to lie bias based on their profession. In the evaluation of videos, stereotypes played a significant role.
The suspects of a different ethnicity or a possible different conviction were considered deceitful more often. The older suspects were considered more truthful than the younger ones.
Research might be beneficial for training in professions that are in need of deception detection techniques and for understanding the influence of stereotypes on our thoughts and evaluation of others.