University of Twente Student Theses


Does P3b guide and sometimes dictate our behavior?

Hashemi, Mahur Melina (2011) Does P3b guide and sometimes dictate our behavior?

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Abstract:Several studies indicated that the P3b component is related to both stimulus and response processes. Referring to this, we proposed a new functional account of the P3b as manifestation of memory consolidation processes that has short-enduring implications on performance. Using the arrow version of the Eriksen flanker task, we tested this assumption on sequential effects. By modulating the trial sequences, it was predicted that the functional relationship of the P3b and the reaction time could help explain the partial dependence of the compatibility effect on the preceding sequence. Trial repetition sequences were predicted to result in a beneficial relation of the P3b and the RT because of facilitating effects of a build memory trace. Alternation sequence should manifest a negative link between these factors because the existing memory trace impairs subsequent performance. The data did not confirm the expected relationship on the sequential flanker effect. However, the P3 amplitude was affected by the amount of conflict on the present trial where low conflict trials generated greater P3b amplitudes. This result was interpreted in terms of greater consolidation processes and subsequent behavioral benefits due to less conflict.
Item Type:Essay (Bachelor)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology BSc (56604)
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