Veli, Levent (2021) An Investigation of Heart Rate Validity and Psychological Correlates of the Out-of-Body Illusion Paradigm. Master thesis, Psychology.
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Abstract
Ehrsson (2007) reported that individuals who experienced the experimentally induced out-of- body illusion (OBI) perceived themselves from a different viewpoint and displayed higher scores of disowning their physical body, which indicated a possible out-of-body experience (OBE). However, previous investigations of the OBI paradigm did not test heart rate as an objective marker to evaluate whether the paradigm successfully induced OBEs or include other relevant variables that could impact responding to the OBI paradigm. Thus, the first goal of this study was to test the validity of the OBI paradigm using heart rate as an objective marker. We further investigated whether sleep quality influences the OBE and the extent to which this relationship is mediated through depersonalization. To accomplish this, 163 undergraduate psychology students underwent the experimental procedure and were startled by a fake threat stimulus after seeing their congruent self-images. Participants wore a Cortrium C3 heart rate monitoring device (Cortrium, 2016). They completed an OBI questionnaire (OBIQ: Ehrsson, 2007), the Pittsburgh Sleep Quality Index (PSQI: Buysse et al. 1989), and a Cambridge Depersonalization Scale (CDS: Sierra and Berrios, 2000). The results from a three-way mixed ANOVA and an independent samples t-test indicated that synchronous tapping did not create a working illusion. This implied that participants did not perceive themselves from a different perspective. An exploratory mediation analysis showed that participants who had sleep deprivation would be more likely to experience depersonalization. There was no significant evidence provided for the mediation effect of depersonalization on sleep quality and OBE. Despite the lack of significant findings, the study is the first to test heart rate as an objective marker and it paves the way for further exploration of the underlying psychological factors contributing to OBEs.
| Item Type: | Thesis (Master) |
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| Supervisor name: | Mertens, Y.L. and Ostafin, B.D. |
| Degree programme: | Psychology |
| Differentiation route: | Clinical Psychology (CP) [Master Psychology] |
| Date Deposited: | 21 Mar 2022 13:01 |
| Last Modified: | 21 Mar 2022 13:01 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/339 |
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