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Record 6 of 28011
Reaction times to weak test lights. [psychophysics biological model]
External Online Source: doi:10.1016/0042-6989(84)90205-0
Author and Affiliation:
Wandell, B. A.(Stanford Univ., CA, United States)
Ahumada, P.(Stanford Univ., CA, United States)
Welsh, D.(Stanford University, Stanford, CA, United States)
Abstract: Maloney and Wandell (1984) describe a model of the response of a single visual channel to weak test lights. The initial channel response is a linearly filtered version of the stimulus. The filter output is randomly sampled over time. Each time a sample occurs there is some probability increasing with the magnitude of the sampled response - that a discrete detection event is generated. Maloney and Wandell derive the statistics of the detection events. In this paper a test is conducted of the hypothesis that the reaction time responses to the presence of a weak test light are initiated at the first detection event. This makes it possible to extend the application of the model to lights that are slightly above threshold, but still within the linear operating range of the visual system. A parameter-free prediction of the model proposed by Maloney and Wandell for lights detected by this statistic is tested. The data are in agreement with the prediction.
Publication Date: Jan 01, 1984
Document ID:
19840057013
(Acquired Nov 28, 1995)
Accession Number: 84A39800
Subject Category: AEROSPACE MEDICINE
Document Type: Journal Article
Publication Information: Vision Research; (ISSN 0042-6989); 24; 7, 19
Publisher Information: United Kingdom
Contract/Grant/Task Num: NIH-2-RO1-EY-03164-04; NCC2-44
Financial Sponsor: NASA; United States
Organization Source: Stanford Univ.; CA, United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BIOLOGICAL MODELS (MATHEMATICS); HUMAN REACTIONS; PHYSIOLOGICAL TESTS; REACTION TIME; VISUAL STIMULI; LINEAR FILTERS; LUMINAIRES; LUMINOUS INTENSITY; PROBABILITY THEORY; PSYCHOPHYSICS; THRESHOLDS (PERCEPTION)
Imprint And Other Notes: Vision Research (ISSN 0042-6989), vol. 24, no. 7, 1984, p. 647-652.
Availability Source: Other Sources
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