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The neural correlates of evidence accumulation and summed similarity in EEG oscillations

Kleine, J. de (2015) The neural correlates of evidence accumulation and summed similarity in EEG oscillations. Bachelor's Thesis, Artificial Intelligence.

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Several studies have indicated a link between scalp EEG oscillations of 4 to 9 Hertz and decision making. An unequivocal connection has been lacking, however, as this theta activity has shown a strong correlation with evidence accumulation irrespective of stimulus similarity in a perceptual decision making task, but also increased with the summed similarity of a probe item to studied items in a recognition decision making task. This current study was to deconfound these two variables by recording scalp EEG activity in participants executing two tasks of roughly equal difficulty, but with different similarity computations. The results should provide grounds for establishing a clearer link between either theta oscillations and evidence accumulation independent of stimulus structure, or between theta oscillations and the summing of similarities. In this present study, we showed left parietal theta activity was linked to direct similarity in a perceptional task, and central alpha activity was correlated to response time in a memory task.

Item Type: Thesis (Bachelor's Thesis)
Supervisor name: Vugt, M. K. van and Beulen, M. A.
Degree programme: Artificial Intelligence
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 08:12
Last Modified: 02 May 2019 11:01

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