Deception effects on standing center of pressure

作者：Mullin Darren S; King Gregory W^*; Saripalle Sashi K; Derakhshani Reza R; Lovelace Christopher T; Burgoon Judee K

来源：Human Movement Science, 2014, 38: 106-115.

DOI：10.1016/j.humov.2014.08.009

• Deception
• Posture
• Biomechanics
• Credibility assessment
• Human

Accurate deception detection is a desirable goal with many applications including credibility assessment, security screening, counter-terrorism, and homeland security. However, many deception detection methodologies involve intrusive sensors or other limitations that preclude their use in a covert manner. Posturography may overcome these limitations by using minimally invasive force platform technology. In this study, we tested the hypothesis that posturography would reveal deception-related increases in postural rigidity similar to those observed with previous methodologies. Participants were randomly assigned to a control (CG) or experimental group (EG), and interviewed about the contents of a backpack in their possession while standing on a force platform. EG participants were asked to conceal the presence of several %26quot;prohibited%26quot; items in the backpack from the interviewer. Center of pressure (COP) measures from the force platform were used to characterize postural sway during participants%26apos; verbal responses. We observed a significant deception-related increase in sway frequency, an effect primarily occurring during longer responses that is likely related to increased cognitive load. These findings suggest deception-related increases in postural rigidity as reported in previous work, and demonstrate the feasibility of using posturography as a deception detection tool.

• 出版日期2014-12