Behavioral estimates of interhemispheric transmission time and the signal detection method: A reappraisal

Brysbaert, Marc (1994) Behavioral estimates of interhemispheric transmission time and the signal detection method: A reappraisal. [Journal (Paginated)]

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On the basis of a review of the literature, Bashore (1981) concluded that only simple reaction time experiments with manual responses yielded consistent behavioral estimates of interhemispheric transmission time. A closer look at the data, however, revealed that these experiments were the only ones in which large numbers of observations were invariably obtained from many subjects. To investigate whether the methodological flaw was the origin of Bashore’s conclusion, two experiments were run in which subjects had to react to lateralized light flashes. The first experiment dealt with manual reactions, the second with verbal reactions. Each experiment included a condition without catch trials (i.e., simple reaction time) and two conditions with catch trials. Catch trials were trials in which no stimulus was given and in which the response was to be withheld. Both experiments returned consistent estimates of interhemispheric transmission time in the range of 2–3 msec. No differences were found between the simple reaction time condition and the signal detection conditions with catch trials. Data were analyzed according to the variable criterion theory. This showed that the effect of catch trials, as well as the effect of interhemispheric transmission, was situated at the height of the detection criterion, and not in the rate of the information transmission.

Item Type:Journal (Paginated)
Keywords:interhemispheric transfer, Poffenberger paradigm, CUD,
Subjects:Neuroscience > Neuropsychology
Psychology > Cognitive Psychology
Neuroscience > Behavioral Neuroscience
ID Code:3528
Deposited By: brysbaert, Dr. marc
Deposited On:07 Apr 2004
Last Modified:11 Mar 2011 08:55

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