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Maximum capacity for sequential one-bit auditory decisions

par Debecker, Julien ;Desmedt, Jean Edouard
Référence Journal of experimental psychology. General, 83, 3 PART 1, page (366-372)
Publication Publié, 1970-03

Article révisé par les pairs

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Résumé :

Studied the maximum intrinsic rate of channel intermittency for sequential decisions in 9 21-30 yr. old Ss, each submitted to about 30 runs of a simple, externally paced task. Any run consisted of a series of 150 stimuli delivered at a regular interval between 2 and .15 sec. 50% of the stimuli were nonsignal clicks randomly mixed with the signal clicks (20-30 db. higher in intensity) to which S was asked to press a Morse key. Analysis of data on hits and false alarms showed that the achieved decisional rate started to lag behind the required rate at about 1.1/sec and it reached a maximum for rates of stimulus presentation of 3-5/sec. The mean maximum rate of correct decisions under such steady-state sensory overload was estimated by 4 methods as 2.15, 2.33, 2.64, and 2.64/sec. The maximum rate is related to decisional rather than to motor effector limitations and may reflect a basic perceptual mechanism of the brain, as suggested from correlative studies on cerebral evoked potentials. (21 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1970 American Psychological Association.