Cognition, Vol. 4, No. 3 by J. Mehler, T. G. Bever & S. Franck (Editors)

By J. Mehler, T. G. Bever & S. Franck (Editors)

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Certainly, whatever the difference, it is in real terms exceedingly small. Choice reaction time The simplest choice task is that of 2-choice discrimination, only one stimulus being imperative. , Gilbert, 1894). More recently, and for a 4-choice discrimination task (2 imperative stimuli), Noble, Baker and Jones (1964) note that “the two sexes appear quite similar in performance level and rate of growth until the age of about 16 years, after which the females begin a fairly linear decline (p. 942).

The recent standardization of WISC-R (Kaufman and Doppelt, 1976) reveals almost perfect parity between the sexes across the range 6 to 16 years. Significant subtest differences are confined, in childhood, to male advantages on Picture Completion and Block Design, and then only at 13 years, on 250 Hugh Fairweather the Scottish standardization of the WISC (1967), which is replicated precisely in adult scores on the WAIS (Matarazzo, 1972). , 1969). The difference on maze performance more generally is also found in adults (Davies, 1965) but has been found to disappear in children: with practice at 3 to 5 years (McGinnis, 1929), and with any kind of reinforcement schedule at 10 and 11 years (Wright, 1968).

Only for left lesion females did both the visuo-spatial and language scores correlate, suggesting more verbal mediation in ‘nonverbal’ tasks by females, and the sort of female ambilaterality noted by Lansdell. McGlone and Kertesz emphasize again that this tendency is often maladaptive: unpublished evidence shows that females lateralized ‘the wrong way’ for dot enumeration are worse on more general visuo-spatial tests. Buffery and Gray point out quite rightly that many clinical reports may be difficult to interpret since subjects were not used or able to be used as their own controls by pre-lesion or pre-operative testing.

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