Continuous cursor tracking as a process-oriented measure of anticipation in soccer: expertise differences in spatial and temporal preparation
چکیده
Introduction Anticipating an opponent's actions is central to performance in team sports such as soccer, where a player must select the correct response within a fraction of a second. Perceptual-cognitive expertise in anticipation is well documented, but standard measures (response time, accuracy, or option choice) capture only the discrete response produced at a single moment and leave the preparatory processing that precedes it unobserved. Building on evidence that hand and cursor movements reveal cognition as it unfolds, the present study examined, as a proof of concept, whether continuous cursor tracking can read out the pre-response preparatory state in a sports anticipation task. Methods Twelve skilled soccer players and twelve novices watched soccer pass-course clips and anticipated which teammate would receive the ball by moving a cursor; the video was stopped at the final frame (the moment a response was required), and the same clips were repeated across three blocks. Two continuous measures were defined: the cursor's Euclidean distance to the correct receiver at response onset (a spatial index of where the participant was poised) and the increase in cursor velocity in the window immediately before response onset (a temporal index of the movement toward the response). Results Compared with novices, skilled players anticipated more accurately, were poised closer to the correct receiver, and showed a larger velocity increase; control analyses argued against the velocity difference being a by-product of the total amount of movement. In an exploratory analysis, the positional difference emerged across repeated presentations of the same clips and was largest in the final block. In addition, the velocity difference was already present in the first presentation, and no significant change across repeated presentations was detected. Discussion The pre-response preparatory state is observed in both a spatial aspect (where one is poised) and a temporal aspect (how one moves toward the response). Because in basic reaching research the position and the velocity of movement index different aspects of decision-making, capturing both under a single continuous measure (which discrete responses cannot) provides a basis for measuring the decision-making processes that underlie anticipation in sport.