title: Visuomotor characterization of eye movements in a drawing task.
abstract: 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.
authors.affiliation: 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
authors.forename: Ruben
authors.initials: R
authors.lastname: Coen-Cagli
authors.forename: Paolo
authors.initials: P
authors.lastname: Coraggio
authors.forename: Paolo
authors.initials: P
authors.lastname: Napoletano
authors.forename: Odelia
authors.initials: O
authors.lastname: Schwartz
authors.forename: Mario
authors.initials: M
authors.lastname: Ferraro
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Boccignone
mesh_terms: 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