Rasztar, Felicitas (2022) Measuring Pupil Dilation in a Concealed Information Test Using Rapid Serial Visual Presentation. Bachelor thesis, Psychology.
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Abstract
Rapid serial visual presentation (RSVP) has been proven to be an effective measurement device in concealed information testing (CIT). RSVP presents stimuli at the fringe of awareness, leading to a low susceptibility to countermeasures. Previous studies successfully measured concealed information based on brain potentials through electroencephalography (EEG). However, the use of pupillometry as measurement during RSVP was proposed due to its cost-effectiveness and easier application into practice. Generally, pupils dilate when being presented with a salient stimulus. This is why we propose pupillary responses to be uninhibited reactions in an RSVP setting and that pupillometry is an effective measurement in detecting concealed identity information. 36 participants were instructed to take on a fake name or keep their real name and search for it in RSVP streams of names. Pupil size was recorded during those streams. We found that pupils were more dilated when participants were presented with their real or fake names compared to control names, yet, the evidence was not significant in the beforehand chosen time window. In the exploratory analysis, however, significant evidence was found in a reduced time window leading to a positive effect for pupillometry use in CIT. Further investigation and development in that field is needed to create a reliable detector of concealed information.
| Item Type: | Thesis (Bachelor) |
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| Supervisor name: | Mijn, W.R. van der |
| Degree programme: | Psychology |
| Differentiation route: | None [Bachelor Psychology] |
| Date Deposited: | 02 Jun 2022 12:13 |
| Last Modified: | 02 Jun 2022 12:13 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/498 |
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