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Gathering human intelligence via repeated interviewing: further empirical tests of the Scharff technique

Artikel i vetenskaplig tidskrift
Författare Simon Oleszkiewicz
Pär-Anders Granhag
Steven Kleinman
Publicerad i Psychology, Crime and Law
Volym 23
Nummer/häfte 7
Sidor 666-681
ISSN 1068-316X
Publiceringsår 2017
Publicerad vid Psykologiska institutionen
Sidor 666-681
Språk en
Länkar dx.doi.org/10.1080/1068316X.2017.12...
Ämnesord Repeated interviews; Scharff technique; human; intelligence gathering; information elicitation; direct approach
Ämneskategorier Tillämpad psykologi

Sammanfattning

Research on investigative interviewing has only recently started to compare the efficacy of different techniques for gathering intelligence from human sources. So far the research has focused exclusively on sources interviewed once, thus overlooking that most sources are interviewed multiple times. The present study attempts to remedy this gap in the literature. Students (N = 66) took on the role of semi-cooperative sources, holding incomplete information about an upcoming terrorist attack. The sources were informed that they would be interviewed at least once, and that additional interviews might follow. Half of the sources were interviewed on three occasions with the Scharff technique (consisting of five tactics), and the other half was interviewed on three occasions using the so-called direct approach (i.e. openended and specific questions). Collapsing the outcome over the three interviews, the Scharff technique resulted in significantly more new information compared to the direct approach. Furthermore, sources interviewed by the direct approach overestimated how much new information they had revealed, whereas the sources interviewed by the Scharff technique underestimated their contribution (although not significantly so). The current study advances previous research by further contextualizing the tests of the efficacy of human intelligence gathering techniques.

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