Reduced flexibility of cognitive control: reactive, but not proactive control, underpins the congruency sequence...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Behavior

Background:

• The congruency sequence effect (CSE) demonstrates enhanced cognitive control after incongruent trials, typically viewed as reactive.
• Previous research suggests proactive control can influence CSE under specific conditions, like informative cues.
• The flexibility of switching between reactive and proactive control modes remains an open question in cognitive science.

Purpose of the Study:

• To investigate whether humans can flexibly switch between reactive and proactive cognitive control mechanisms.
• To examine if the congruency sequence effect (CSE) size varies based on cue informativeness and cue-stimulus interval (CSI).
• To test the hypothesis that cognitive control flexibility depends on the interplay between reactive and proactive control.

Main Methods:

• Fifty-five participants completed a confound-minimized Stroop task.
• Experimental conditions varied cue informativeness (informative vs. non-informative) and cue-stimulus interval (CSI; short vs. long).
• The study analyzed the CSE size across these four combined conditions to assess cognitive control flexibility.

Main Results:

• The congruency sequence effect (CSE) was significant across all tested conditions.
• CSE magnitude remained comparable regardless of cue type or CSI duration.
• Findings suggest that the CSE primarily arises from reactive cognitive control processes.

Conclusions:

• The study's results do not support the hypothesis of flexible switching between reactive and proactive control influencing the CSE.
• Cognitive control, as reflected by the CSE, appears to be predominantly reactive under the tested experimental parameters.
• The findings are discussed in the context of the dual mechanism of control (DMC) framework.