Structured perceptual arrays and the modulation of Fitts's law: Examining saccadic eye movements

Naseern Al-Aidroos, Martin H. Fischer, Jos J. Adam, Jay Pratt

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    6 Citations (Scopus)


    On the basis of recent observations of a modulation of Fitts's law for manual pointing movements in structured visual arrays (J.J. Adam, R. Mol, J.Pratt, & M. H. Fischer, 2006; J. Pratt, J. J. Adam, & M. H. Fischer, 2007), the authors examined whether a similar modulation occurs for saccadic eye movements. Healthy participants (N = 19) made horizontal saccades to targets that appeared randomly in I of 4 positions, either on an empty background or within I of 4 placeholder boxes. Whereas in previous studies, placeholders caused a decrease in movement time (MT) without the normal decrease in movement accuracy predicted by Fitts's law, placeholders in the present experiment increased saccadic accuracy (decreased endpoint variability) without an increase in MT. The present results extend the findings of J. J. Adam et a]. of a modulation of Fitts's law from the temporal domain to the spatial domain and from manual movements to eye movements.

    Original languageEnglish
    Pages (from-to)155-164
    Number of pages10
    JournalJournal of Motor Behavior
    Issue number2
    Publication statusPublished - Mar 2008

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