SIGNAL PROBABILITY AND VIGILANCE: A REAPPRAISAL OF THE 'SIGNAL-RATE' EFFECT

SIGNAL PROBABILITY AND VIGILANCE: A REAPPRAISAL OF THE 'SIGNAL-RATE' EFFECT

Performance on a 40 min. visual task was studied as a function of signal probability. A separate group was tested at each of five levels of signal probability (0·02, 0·06, 0·18, 0·24 and 0·36). Percent detections increased with signal probability. This increase was accompanied by a rise in the false...

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Veröffentlicht in:The British journal of psychology 1969-05, Vol.60 (2), p.169-178
Hauptverfasser: BADDELEY, A. D., COLQUHOUN, W. P.
Format: Artikel
Sprache:eng
Schlagworte:
Adolescent
Adult
Analysis of Variance
Attention
Discrimination (Psychology)
Humans
Information Theory
Male
Probability
Size Perception
Time Factors
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Zusammenfassung:Performance on a 40 min. visual task was studied as a function of signal probability. A separate group was tested at each of five levels of signal probability (0·02, 0·06, 0·18, 0·24 and 0·36). Percent detections increased with signal probability. This increase was accompanied by a rise in the false report rate, and analysis in terms of signal detection theory suggested that signal probability affects the subject's criterion (β) rather than his ability to discriminate (d′).
ISSN:0007-1269
2044-8295
DOI:10.1111/j.2044-8295.1969.tb01189.x