Interrogating to Detect Deception and Truth: Effects of Strategic Use of Evidence
Date
2005
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Department of Psychology, Göteborg University
Abstract
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For centuries, philosophers have pondered on the nature of human deception (see e.g., Bok, 1989). However, the scientific approach to human deception is far younger. For some decades, psychologists and scholars within the domain of communication have studied deception as a phenomenon of interpersonal relations (Ekman, 2001). Researchers have also focused on the nature of deception in applied contexts, such as in a forensic one (Granhag & Strömwall, 2004). In the legal system, professionals such as police officers and judges frequently face the task of having to judge the veracity of a person, be it a witness, alleged crime victim or a suspect. These judgments can be of utmost importance in the legal process, and the outcome of the judgments can have farreaching consequences for the person being judged. Detection of deception in the legal system is the focus of the present thesis. More specifically, I will examine the detection of deception in the context of interrogations, with a special focus on the effects of strategic use of the available evidence. Before summarizing the four empirical studies on this topic, I will provide an overview of the research on deception, and describe the relevant literature on interrogating suspects.
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