Metacontrast and brightness discrimination

Ira H. Bernsteint, Janet D. Proctor, Robert W. Proctor, Donald L. Schurman

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

An attempt was made to obtain U-shaped masking functions in two metacontrast experiments. Trained Ss judged whether a square test stimulus (TS) was bright or dim. The TS was presented alone or in conjunction with an adjacent pair of square masking stimuli (MS) whose energy equaled the bright TS. The stimulus onset asynchronies (SOA) rangedfrom 0 to 125 msec. The task minimized the role of apparent movement cues as a reliable basis for judgrnent. Similar studies have employed TS plus MS vs MS alone as the alternatives, allowing apparent movement to be a cue. Brightness accuracy was a U-shaped function of SOA. This finding is consistent with neural-net models (Weisstein, 1968). However, analysis of Ss' response bias suggested an alternative explanation involving the MS as a comparison stimulus at short SOA. It was concluded that U-shaped masking functions are also consistent with theories based upon independent component processes, e.g., Schurman and Eriksen (1970) and Uttal (1970).

Original languageEnglish (US)
Pages (from-to)293-297
Number of pages5
JournalPerception & Psychophysics
Volume14
Issue number2
DOIs
StatePublished - Jun 1973

Fingerprint

Cues
stimulus
discrimination
Discrimination (Psychology)
Brightness
Stimulus
Discrimination
Masking
energy
experiment

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Sensory Systems
  • Psychology(all)

Cite this

Bernsteint, I. H., Proctor, J. D., Proctor, R. W., & Schurman, D. L. (1973). Metacontrast and brightness discrimination. Perception & Psychophysics, 14(2), 293-297. https://doi.org/10.3758/BF03212393

Metacontrast and brightness discrimination. / Bernsteint, Ira H.; Proctor, Janet D.; Proctor, Robert W.; Schurman, Donald L.

In: Perception & Psychophysics, Vol. 14, No. 2, 06.1973, p. 293-297.

Research output: Contribution to journalArticle

Bernsteint, IH, Proctor, JD, Proctor, RW & Schurman, DL 1973, 'Metacontrast and brightness discrimination', Perception & Psychophysics, vol. 14, no. 2, pp. 293-297. https://doi.org/10.3758/BF03212393
Bernsteint IH, Proctor JD, Proctor RW, Schurman DL. Metacontrast and brightness discrimination. Perception & Psychophysics. 1973 Jun;14(2):293-297. https://doi.org/10.3758/BF03212393
Bernsteint, Ira H. ; Proctor, Janet D. ; Proctor, Robert W. ; Schurman, Donald L. / Metacontrast and brightness discrimination. In: Perception & Psychophysics. 1973 ; Vol. 14, No. 2. pp. 293-297.
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