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Proportion compatibility effects on visual mismatch negativity in a flanker task.

¹Faculty of Education, Shitennoji University, 3-2-1 Gakuenmae, Habikino, Osaka, Japan.

Biological Psychology

|October 3, 2022

Summary

This summary is machine-generated.

Proportion compatibility effects influence visual mismatch negativity (VMMN) in flanker tasks. Visual mismatch negativity for deviant stimuli appeared in mostly compatible blocks but not mostly incompatible blocks.

Keywords:

Cognitive control Conflict adaptation Interference tasks Proportion compatibility effects Visual mismatch negativity

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Area of Science:

Cognitive Neuroscience
Psychology
Neuroscience

Background:

Proportion compatibility effects are common in interference tasks, impacting performance based on stimulus probability.
Visual mismatch negativity (VMMN) is an electrophysiological measure reflecting the detection of infrequent, deviant visual stimuli.

Purpose of the Study:

To investigate proportion compatibility effects on VMMN within a flanker task.
To determine how stimulus probability influences VMMN generation for compatible, incompatible, and deviant stimuli.

Main Methods:

Participants completed a flanker task with compatible, incompatible, and deviant stimuli.
The task was presented in blocks with mostly compatible (MC), mostly incompatible (MI), or equal probability (EP) of stimuli.
Electroencephalography (EEG) was used to measure posterior negativity (200-250 ms) as an index of VMMN.

Main Results:

VMMN for deviant stimuli was significantly more negative in MC blocks compared to EP blocks.
No significant difference in VMMN was found between MI and EP blocks.
Posterior negativity for incompatible stimuli was modulated by stimulus probability, unlike for compatible stimuli.

Conclusions:

VMMN was elicited by deviant stimuli in MC blocks but not in MI blocks.
Incompatible stimuli elicited VMMN, suggesting proactive control in MI blocks may reduce processing of irrelevant stimuli.
Findings highlight the role of proactive control in modulating early visual processing based on expected stimulus proportions.