Psychophysiological differentiation of deception: the effects of electrodermal lability and mode of responding on skin conductance and heart rate

Separating deceptive and orienting components in a Concealed Information Test

“…In contrast to previous studies (e.g. Gödert et al, 2001), this was not observed in the present study. Possibly, such a deceleration (which should follow object presentation), was masked by the four-seconds delayed motor response component (vocalization and key press) in this study.…”

“…Differentiation between deceptive and truthful answers can be made within or between subjects. Whereas Furedy et al (1988), and Gödert et al (2001), advised subjects to answer half of the questions deceptively and the other half honestly, according to a question-wise indication, Furedy and Ben-Shakhar (1991) studied the variation in the type of verbal answer between subjects.…”

“…However, phasic heart rate (HR) and respiration line length (RLL) are also known to be valid indicators of concealed information (Bradley and Janisse, 1981;Bradley and Rettinger, 1992); furthermore, heart rate has been shown to be sensitive to deceptive answering in the context of the CIT (Gödert et al, 2001). The issue of what these measures reflect in detail, with regard to the CIT as well as the psychophysiology of cognitive processes in general, is still under discussion.…”

Peripheral Autonomic Signals as Access Pathways for Individuals with Severe Disabilities: A Literature Appraisal

“…Most polygraph studies before 1990 used EDA as the sole dependent variable and were nonetheless able to obtain high accuracy estimates of deception [80,81]. The generation of EDRs in response to recognition has been replicated over a variety of conditions, including motivation to deceive, perceived accuracy of polygraphy, free or forced choice of deceptive items, mode of response (e.g., verbal or pressing keys) and degree of emotional involvement [82]. Mental countermeasures against this response involve either the suppression of an EDR after a recognition event, or the voluntary generation of an EDR after a control question.…”

The Concealed Information Test as an Instrument of Applied Differential Psychophysiology: Methodological Considerations

“…Although a few other labs have employed the DDP preparation to investigate, psychophysiologicaly, the interesting psychological function of deception (e.g., Dionisio et al 2001;Gödert et al 2001), it is puzzling that interest in the deception phenomenon has been so low among most psychophysiological researchers. One reason may be that the area of ''lie detection'' has been very controversial, which may have put off those reliant on external grant funding for their other research.…”