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How to interrogate to detect deception

Konferensbidrag (offentliggjort, men ej förlagsutgivet)
Författare Pär-Anders Granhag
Publicerad i Invited keynote lecture at the conference “Interpersonal deception: Detection, neuroimaging, and pragmatic inference” (Aarhus University, Denmark)
Publiceringsår 2006
Publicerad vid Psykologiska institutionen
Språk en
Ämnesord Deception detection, Interrogation, Suspects’ strategies
Ämneskategorier Psykologi

Sammanfattning

Decades of psycho-legal research has shown that both lay people and presumed experts (e.g., police officers) are poor at detecting deception. However, previous research has neglected that in many real-life situations there is evidence against a suspect. This paper will focus on the presence of evidence during interrogation, and how strategic use of this evidence can affect the statements of the suspects as well as the accuracy of the lie-catchers. Specifically, the focus of the paper is guilty and innocent suspects’ verbal strategies. The point of departure will be two types of fundamental human behaviour, stemming from research on aversive conditioning: avoidance and escape. It will be argued that construing the mental threat that is experienced in the interrogation room as an aversive stimulus opens a path for understanding the strategies used by guilty and innocent suspects. Furthermore, and importantly, it informs us on how the differences in strategies can be utilized to increase lie-catchers’ deception detection accuracy. The paper consists of three parts; (1) an outline of a general theoretical framework, (2) a specification of the predictions that can be derived from this theoretical framework, and (3) a summary of what the empirical tests of these predictions show.

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