Visual-motor recalibration in geographical slant perception

Bhalla, M.; Proffitt, D. R.; Kaiser, M. K.

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NASA NTRS · 20040141850

Visual-motor recalibration in geographical slant perception

Bhalla, M.·Proffitt, D. R.·Kaiser, M. K.

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Abstract

In 4 experiments, it was shown that hills appear steeper to people who are encumbered by wearing a heavy backpack (Experiment 1), are fatigued (Experiment 2), are of low physical fitness (Experiment 3), or are elderly and/or in declining health (Experiment 4). Visually guided actions are unaffected by these manipulations of physiological potential. Although dissociable, the awareness and action systems were also shown to be interconnected. Recalibration of the transformation relating awareness and actions was found to occur over long-term changes in physiological potential (fitness level, age, and health) but not with transitory changes (fatigue and load). Findings are discussed in terms of a time-dependent coordination between the separate systems that control explicit visual awareness and visually guided action.

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NASA Center ARC NASA Discipline Space Human Factors Geography Psychomotor Performance/physiology Awareness/physiology Visual Perception/physiology Photic Stimulation/instrumentation Adult Support, U.S. Gov't, Non-P.H.S Equipment Design Aged Judgment/physiology Human Support, U.S. Gov't, P.H.S Male Female Aged, 80 and over Middle Aged

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Bhalla, M., Proffitt, D. R., Kaiser, M. K.. 1999-08-01. Visual-motor recalibration in geographical slant perception. https://ntrs.nasa.gov/citations/20040141850

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