Eye and hand coarticulation during problem-solving reveals hierarchically organized planning

Abstract

Coarticulation, the modulation of an action’s execution based on upcoming actions, offers a valuable window into covert planning, typically defined as the goal-directed concatenation of actions. Most prior studies have examined coarticulation in instructed, cued, or routinized sequences. In contrast, we provide a comprehensive characterization of coarticulation in both gaze behavior and hand kinematics (via cursor movements) during a planning task where participants must generate novel solutions from scratch on each trial.