Scheuble, Vera Julia: Determinants of event-related potentials during deception paradigms : Investigating individual differences and effects of the moral context. - Bonn, 2022. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5-67881
@phdthesis{handle:20.500.11811/10223,
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5-67881,
author = {{Vera Julia Scheuble}},
title = {Determinants of event-related potentials during deception paradigms : Investigating individual differences and effects of the moral context},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2022,
month = sep,

note = {Paradigms based on event-related potentials (ERPs) are promising for detecting deception. However, less is known about moderators of the ERP patterns during deception tasks. To ensure that the investigated ERPs are markers for deception in multiple situations and for different individuals, their moderating variables need to be unraveled. Furthermore, this allows to better understand the cognitive processes involved in deception tasks. Therefore, in three studies, determinants of P300s and medial frontal negativities (MFNs) in deception tasks were investigated. A special focus lied on variables related to morality.
ERP-based deception studies typically apply the concealed information test (CIT): Participants conceal knowledge about probe items, which they have seen before, e.g., during a mock-crime, and honestly indicate for irrelevant items that they do not know them. In two of the thesis' studies, the situations before the CIT, during which participants got to know the probe items, were manipulated. In one study, the moderating effect of moral involvement was analyzed: Some participants witnessed, and others demonstrated, a behavior causing a small social problem. Additionally, I investigated whether Machiavellianism moderates the patterns of P300 and MFN amplitudes. In another study, the moderating effect of moral valence was examined. Participants saw the probe items while performing a negative or positive behavior (committing mock-theft vs. giving a present). In a third study, participants lied about their attitudes. The moderating effect of Machiavellianism on P300 and MFN amplitudes was also investigated for this deception paradigm.
Overall, MFN amplitudes were enlarged for deceptive compared to honest responses, indicating stronger response conflicts for deception. As expected, the P300 displayed a dual-nature in the two deception paradigms. For CITs, P300s were enlarged for probe items requiring a deceptive response, compared to irrelevant items requiring an honest response, revealing a greater salience of probe items. In the paradigm that did not involve the concealment of knowledge but deception about attitudes, P300 amplitudes were suppressed for deceptive compared to honest responses, revealing a greater mental workload for deception. Whereas moral valence did not moderate patterns of MFN amplitudes, a moderation effect occurred for moral involvement. The difference of MFNs between probe and irrelevant items was reduced for participants witnessing a behavior causing a problem than for participants demonstrating this behavior. Accordingly, conflicts during deception were attenuated for witnesses. In general, Machiavellianism did not moderate the conflicts during deception, as indicated by MFN amplitudes, but did so in one condition in which the benefits of deception could be perceived as high. Patterns of P300 amplitudes proved to be stable for differences in the variables related to morality. P300 amplitudes seem to be promising markers of deception, even in social, non-forensic situations. They were unaffected by Machiavellianism, situations with a positive and negative moral valence, witnesses as well as people performing a behavior causing a small social problem.},

url = {https://hdl.handle.net/20.500.11811/10223}
}

Die folgenden Nutzungsbestimmungen sind mit dieser Ressource verbunden:

InCopyright