Eye tracking measures of uncertainty during perceptual decision making

被引:52
作者
Brunye, Tad T. [1 ,2 ,3 ]
Gardony, Aaron L. [1 ,2 ]
机构
[1] Ctr Appl Brain & Cognit Sci, 200 Boston Ave,Suite 3000, Medford, MA 02155 USA
[2] US Army, Natick Soldier Res Dev & Engn Ctr, Natick, MA 01760 USA
[3] Tufts Univ, Dept Psychol, Medford, MA 02155 USA
关键词
Perceptual decision making; Eye tracking; Uncertainty; Pupil diameter; PUPIL-LINKED AROUSAL; LOCUS-COERULEUS; DIAGNOSTIC-ACCURACY; VISUAL FIXATIONS; ADAPTIVE GAIN; CHOICE; MOVEMENTS; SELECTION; DIFFICULTY; PREDICTS;
D O I
10.1016/j.ijpsycho.2017.07.008
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Perceptual decision making involves gathering and interpreting sensory information to effectively categorize the world and inform behavior. For instance, a radiologist distinguishing the presence versus absence of a tumor, or a luggage screener categorizing objects as threatening or non-threatening. In many cases, sensory information is not sufficient to reliably disambiguate the nature of a stimulus, and resulting decisions are done under conditions of uncertainty. The present study asked whether several oculomotor metrics might prove sensitive to transient states of uncertainty during perceptual decision making. Participants viewed images with varying visual clarity and were asked to categorize them as faces or houses, and rate the certainty of their decisions, while we used eye tracking to monitor fixations, saccades, blinks, and pupil diameter. Results demonstrated that decision certainty influenced several oculomotor variables, including fixation frequency and duration, the frequency, peak velocity, and amplitude of saccades, and phasic pupil diameter. Whereas most measures tended to change linearly along with decision certainty, pupil diameter revealed more nuanced and dynamic information about the time course of perceptual decision making. Together, results demonstrate robust alterations in eye movement behavior as a function of decision certainty and attention demands, and suggest that monitoring oculomotor variables during applied task performance may prove valuable for identifying and remediating transient states of uncertainty.
引用
收藏
页码:60 / 68
页数:9
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