Graduate School of Informatics /Cognitive Sciences

In partial fulfillment of the requirements for the degree of Master of Science Alaz Aydın will defend his thesis.

Title: CORTICAL PROCESSES UNDERLYING METACONTRAST MASKING ACROSS DIFFERENT CONTRAST POLARITIES

Date: 31st August 2018

Time: 14:00 PM

Place: A-108

Thesis Abstract :In this study a metacontrast masking experiment is conducted together with electroencephalography (EEG) recordings in order to investigate the neural mechanisms underlying visual masking phenomena. We employed a feature-based detection task under same and opposite target-mask contrast polarity conditions, together with varying onset asynchronies. Behavioral experiments resulted in unimodal type- A and B backward masking functions for opposite and same contrast polarity conditions, respectively. Relying on this difference as an indication of non-identical neural mechanisms we collected EEG data for an exploratory analysis.