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Pubmed for Handhelds

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  • Title: Visuomotor characterization of eye movements in a drawing task.
    Author: Coen-Cagli R, Coraggio P, Napoletano P, Schwartz O, Ferraro M, Boccignone G.
    Journal: Vision Res; 2009 Mar; 49(8):810-8. PubMed ID: 19268685.
    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.
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