Fixations and pupil size as indicators of deceptive intentions
Tue-H4-Talk 6-6402
Presented by: Valentin Foucher
Eyes have shown great potential to reveal cognitive processes as deceptive intentions. However, the complexity of comprehending the connection between eyes and deceptive behaviours is heightened by the eyes’ susceptibility to numerous external and internal factors. This complexity occasionally results in contradictory findings in different studies. In this study, we investigated fixations and pupil motion as indicators of deceptive intentions in a card game design where participants had to choose a number on a card from 1 to 6 and were then presented with all the card possibilities. Two levels of deceptive intentions were tested - concealing or faking the chosen number - and compared to a control condition where participants had to be honest about this number. Two stimuli layouts were tested where the card possibilities were presented at the same time or one after another on a screen. Results showed that the concealing condition could be identified by more and shorter fixations when multiple cards were on screen, and by fewer and longer fixations when a single card was on screen. Fixations also revealed the cards participants wanted to communicate about in honest and faking conditions, while pupil size additionally unveiled the chosen card for both concealing and faking conditions. Interestingly, the two stimuli layouts induced opposite fixations behaviours for the same instruction. We suggest that at least two kinds of deceptive intentions should be carefully differentiated from eye movements while confirming the efficiency of gaze measures as indicators of deceptive intentions.
Keywords: eye tracking, intention, deception, faking, concealing, lying