Journal article

Publication year: 2008

Pages: 95-104

Journal: International Journal of Psychophysiology

Volume number: 70

Issue number: 2

ISSN: 0167-8760

eISSN: 1872-7697

DOI Link: https://doi.org/10.1016/j.ijpsycho.2008.07.002

Publisher: Elsevier

Abstract: 
The Concealed Information Test (CIT) requires the examinee to deceptively deny recognition of known stimuli and to truthfully deny recognition of unknown stimuli. Because deception and orienting are typically coupled, it is unclear how exactly these sub-processes affect the physiological responses measured in the CIT. The present study aimed at separating the effects of deception from those of orienting. In a mock-crime study, using a modified CIT, thirty-six of seventy-two subjects answered truthfully ('truth group'), whereas the other thirty-six concealed their knowledge ('lie group'). Answering was delayed for 4 s after item presentation. Electrodermal activity (EDA), respiration (RLL), and phasic heart rate (HR) were recorded. A decomposition of EDA responses revealed two response components; the response in the first interval was expected to indicate orienting, stimulus evaluation, and answer preparation, whereas the response in the second interval was assumed to reflect answer-related processes. Inconclusively, both EDA components differentiated between 'probe' and 'irrelevant' items in both groups. Phasic HR and RLL differed between item classes only in the 'lie' group, thus reflecting answer-related processes, possibly deception, rather than merely orienting responses. The findings further support the notion that psychophysiological measures elicited by a modified CIT may reflect different mental processes involved in orienting and deception. (C) 2008 Elsevier B.V. All rights reserved.

Harvard Citation style: Ambach, W., Stark, R., Peper, M. and Vaitl, D. (2008) Separating deceptive and orienting components in a Concealed Information Test, International Journal of Psychophysiology, 70(2), pp. 95-104. https://doi.org/10.1016/j.ijpsycho.2008.07.002

APA Citation style: Ambach, W., Stark, R., Peper, M., & Vaitl, D. (2008). Separating deceptive and orienting components in a Concealed Information Test. International Journal of Psychophysiology. 70(2), 95-104. https://doi.org/10.1016/j.ijpsycho.2008.07.002