Switch hands! Mapping temporal dynamics of proactive manual control with anticues.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Motor Control

Background:

• Proactive control is crucial for resolving response conflict in motor systems.
• Existing tasks often use procues for response preparation, but anticues offer a novel approach.

Purpose of the Study:

• To investigate the temporal dynamics of proactive control using a new anticue task.
• To understand how anticues resolve response conflict in the manual motor system.

Main Methods:

• A 4-choice reaction time (RT) task with anticues (requiring preparation of the opposite hand) and procues (requiring preparation of the same hand).
• Experiment 1 varied cue-target intervals (100-850ms) to assess RT benefits/costs.
• Experiment 2 used a detection response to rule out attentional explanations.

Main Results:

• Procues yielded RT benefits that increased with longer cue-target intervals.
• Anticues initially caused RT costs but shifted to benefits at longer intervals.
• Findings support a time-consuming proactive control process involving inhibition and activation.

Conclusions:

• Anticues demonstrate a proactive control mechanism that resolves conflict by redirecting motor activation.
• This process involves temporal dynamics of inhibition and activation, distinct from simple attention.
• Results inform dual-route models and relate to paradigms like Stroop and task switching.