Modulation of cortical oscillatory activity during visual causality judgments

• Grant number: 17/26235-5
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Start date: April 01, 2018
• End date: September 15, 2018
• Field of knowledge: Humanities - Psychology - Cognitive Psychology
• Principal Investigator: André Mascioli Cravo
• Grantee: Esaú Sirius Ventura Pupo
• Supervisor: Simon Hanslmayr
• Host Institution: Centro de Matemática, Computação e Cognição (CMCC). Universidade Federal do ABC (UFABC). Santo André , SP, Brazil
• Institution abroad: University of Birmingham, England
• Associated to the scholarship: 16/20042-8 - Discrete perception: experimental evidences and neural correlates, BP.MS

Abstract

Incoming sensorial information seems to us to be processed and perceived in a continuous manner. However, there are theories that will oppose to this continuity and argue that perception is discrete, made up of small temporal intervals. Among others, the perception of causality in the launching effect may be explained by discrete perception, with movement onsets taking place in the same or in adjacent temporal frames, opposed to perceptually non-causal events taking place too much apart in time. Neural oscillations have been pointed as a possible mechanism for a discrete temporal processing. Recently, the phase of alpha oscillations was shown to predict volunteers' causality judgments in the launching effect. However, this result is of correlational nature. To validate further the causal role of alpha oscillations in this process we suggest (1) the replication of said results, (2) the modulation of oscillatory activity during task performance in frequencies below and above alpha, and (3) the analysis of behaviour and brain activity in the different conditions. To achieve these aims, Michotte's classical launching effect experiment will be conducted with concomitant readings of electroencephalography (EEG) and transcranial alternate current stimulation (tACS). The results should provide evidence that alpha oscillatory activity has a causal role in the visual causality judgments. (AU)