Publication

Neural dynamics of the competition between grouping organizations

Résumé

Neural dynamics of the competition between grouping organizations have been studied to a limited extent. The paradigms used so far confounded grouping operations with task demands, using explicit reports of the predominantly perceived organization and biasing attention toward one grouping principle. This study explored the effect of grouping strength on ERPs elicited for conflicting grouping principles using a primed-matching paradigm, where the grouping display was irrelevant to the task. In Experiment 1, proximity was pitted against brightness similarity in a conflicting columns/rows organization. Competition level was manipulated by increasing grouping strength of one principle or the other. In Experiment 2, proximity was presented alone or in a weak/strong competition with size similarity. If conflicting organizations result in a hybrid representation, modifications would be evident for different degrees of grouping strength at early perceptual components. However, a competition-related component would appear in a later stage of processing, showing a difference between conflict and nonconflict conditions. We found no evidence for a competition specific component but did find modulations to the ERP waveforms at around 100 to 250 milliseconds from target onset. These results suggest that when grouping principles are in conflict, they produce a hybrid representation of the dominant and nondominant organizations.

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Concepts associés (32)
Competition
Competition is a rivalry where two or more parties strive for a common goal which cannot be shared: where one's gain is the other's loss (an example of which is a zero-sum game). Competition can arise between entities such as organisms, individuals, economic and social groups, etc. The rivalry can be over attainment of any exclusive goal, including recognition. Competition occurs in nature, between living organisms which co-exist in the same environment. Animals compete over water supplies, food, mates, and other biological resources.
Concurrence pure et parfaite
La concurrence pure et parfaite (CPP) ou, tout simplement, la concurrence parfaite, correspond à la théorie de la formation du prix élaborée au par les économistes néo-classiques. La concurrence pure et parfaite est censée permettre l’équilibre sur tous les marchés sous des conditions suffisantes très particulières. La concurrence pure et parfaite représente un des deux cas extrêmes de structures de marché étudiés par les économistes néoclassiques, le second étant le cas de monopole.
Event-related potential
An event-related potential (ERP) is the measured brain response that is the direct result of a specific sensory, cognitive, or motor event. More formally, it is any stereotyped electrophysiological response to a stimulus. The study of the brain in this way provides a noninvasive means of evaluating brain functioning. ERPs are measured by means of electroencephalography (EEG). The magnetoencephalography (MEG) equivalent of ERP is the ERF, or event-related field. Evoked potentials and induced potentials are subtypes of ERPs.
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