University of Twente Student Theses


Improving veracity judgement accuracy: an eye-tracking study

Schimmel, J.M. (2021) Improving veracity judgement accuracy: an eye-tracking study.

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Abstract:People have proven to be very skilled liars and the detection of deception remains a challenge until this day. Namely, people perform around chance level when trying to detect deception (Bond & DePaulo, 2006). This experimental study investigated ways to improve accuracy in deception detection. This is done by studying the receiver of lies instead of the sender and by using an eye-tracker on the receiver. With a 2x2 between-subjects design the effects of role type (receiver or observer) and medium type (face-to-face or video) on veracity judgement accuracy and gaze behaviour were investigated. Also, it was tested whether indirect measures outperformed direct measures. Further, the effects of relational and behavioural familiarity on accuracy were investigated. Lastly, additional analyses explored the relation between gaze behaviour (of the receiver of lies on distinct areas of the body of the liar) and accuracy. There were no effects of the role and medium type on accuracy. Role type and medium type did, however, elicit differences in gaze behaviour. Yet, differences in gaze behaviour did not translate to differences in accuracy, indicating that accuracy is not dependent on what has been perceived. However, further analyses (regardless of the conditions) examined the relation between the time that receivers spent on looking at distinct areas on the body of the liar and accuracy. The time that the receiver spent looking at the feet and legs predicted positively accuracy rates, whereas the time spent on hands and arms significantly impaired accuracy. Time spent on the face seemed unrelated to accuracy. These findings seem to support the existence of nonverbal cues to deception which will have implications for the discipline of deception detection. Indirect measures, relational and behavioural familiarity did not have an effect on veracity judgement accuracy.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
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