Visuomotor characterization of eye movements in a drawing task.
Understanding visuomotor coordination requires the study of tasks that engage mechanisms for the integration of visual and motor information; in this paper we choose a paradigmatic yet little studied example of such a task, namely realistic drawing. On the one hand, our data indicate that the motor task has little influence on which regions of the image are overall most likely to be fixated: salient features are fixated most often. Viceversa, the effect of motor constraints is revealed in the temporal aspect of the scanpaths: (1) subjects direct their gaze to an object mostly when they are acting upon (drawing) it; and (2) in support of graphically continuous hand movements, scanpaths resemble edge-following patterns along image contours. For a better understanding of such properties, a computational model is proposed in the form of a novel kind of Dynamic Bayesian Network, and simulation results are compared with human eye-hand data.
Coen-Cagli
Ruben
R
Department of Neuroscience, Albert Einstein College of Medicine of Yeshiva University, 1410 Pelham Pkwy S., Rm 921, Bronx, New York 10461, USA. rcagli@aecom.yu.edu
Coraggio
Paolo
P
Napoletano
Paolo
P
Schwartz
Odelia
O
Ferraro
Mario
M
Boccignone
Giuseppe
G
D000465:Algorithms; D001154:Art; D005133:Eye Movements / Q000502:physiology*; D005403:Fixation, Ocular / Q000502:physiology; D006225:Hand / Q000502:physiology*; D006801:Humans; D008960:Models, Psychological; D009068:Movement / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology