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Attentional Control in Anterior Cingulate Cortex Based on Probabilistic Cueing

Summary: Attentional Control in Anterior Cingulate Cortex
Based on Probabilistic Cueing
Esther Aarts and Ardi Roelofs
In Stroop-like tasks, conflict effects in behavioral measures
and ACC activity are smaller on trials following an incongruent
trial than following a congruent one. Researchers have found
no agreement on whether these sequential effects in ACC can
be driven by experienced incongruency only or also by expec-
tations about target types. In the present fMRI experiment, we
specifically manipulated the expectancies by using symbolic cues
predicting with 75% or 50% certainty the incongruent or congru-
ent targets in a Stroop-like task. Both behavioral and dorsal ACC
data replicated previous sequential effects, with conflict effects
being smallest for targets following the cues that predicted with
75% certainty the incongruent targets. However, these effects
were not driven by experienced conflict but by symbolic cues.
These results demonstrate differential attentional control activity
in ACC after probabilistic cueing, providing evidence for control
adjustments driven by changes in expectation.


Source: Aarts, Esther - Helen Wills Neuroscience Institute, University of California at Berkeley


Collections: Biology and Medicine