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Unmasking the perception of temporal successions

Bridge building between metacontrast masking and temporal integration and segregation processes

dc.contributor.advisorAlbrecht, Thorsten Dr.
dc.contributor.authorKraut, Alexander
dc.format.extent266 Seitende
dc.titleUnmasking the perception of temporal successionsde
dc.title.alternativeBridge building between metacontrast masking and temporal integration and segregation processesde
dc.contributor.refereeAlbrecht, Thorsten Dr.
dc.description.abstractengTemporal and masking research share theoretical, methodological and empirical similarities indicating that they might investigate a similar aspect of our neural functioning. Nevertheless, temporal and masking mechanisms have never before been concurrently investigated which is even more surprising since each mechanism has been proposed to be relevant in the respective other field of research. The three studies of this dissertation constitute a first step towards building a bridge between the temporal and masking research. In each of our studies, we conducted a metacontrast masking experiment and asked our participants to report on each trial whether they perceived the target-mask sequence temporally integrated, temporally segregated or masked while their neural activity was continuously recorded. By contrasting the neural activity between perceptual reports, our findings demonstrate pre-stimulus theta, alpha and beta phase differences between temporally integrated and segregated percepts. While we associated theta and alpha phase differences with a bottom-up temporal mechanism in the ventral stream, we associated beta phase differences with a top-down bias that frontal brain areas exert on brain areas further down in the neural hierarchy. In addition, post-stimulus differences in the event-related potentials indicated a spatio-temporal integration mechanism to be relevant for both temporally integrated and masked percepts. Overall, our findings extend established neural correlates of temporal mechanisms to the metacontrast masking paradigm. In addition, we demonstrate the potential information gain from concurrently investigating temporal and masking mechanisms by indicating a shared mechanism for both temporal and masking
dc.contributor.coRefereeSchacht, Annekathrin Prof. Dr.
dc.subject.engmetacontrast maskingde
dc.subject.engtemporal integration and segregationde
dc.subject.engevent-related potentialsde
dc.subject.engpre-stimulus activityde
dc.subject.engtime-frequency analysisde
dc.subject.engtwo-flash taskde
dc.subject.engmissing element taskde
dc.affiliation.instituteBiologische Fakultät für Biologie und Psychologiede
dc.subject.gokfullPsychologie (PPN619868627)de
dc.notes.confirmationsentConfirmation sent 2023-03-02T15:15:01de

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