Visuomotor characterization of eye movements in a drawing task

Ruben Coen-Cagli, Paolo Coraggio, Paolo Napoletano, Odelia Schwartz, Mario Ferraro, Giuseppe Boccignone

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)810-818
Number of pages9
JournalVision Research
Volume49
Issue number8
DOIs
StatePublished - May 4 2009
Externally publishedYes

Keywords

  • Bayesian
  • Drawing
  • Visuomotor

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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