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Facon, Bruno – Research in Developmental Disabilities: A Multidisciplinary Journal, 2008
The similar-sequence and the similar-structure hypotheses are the two mainstays of the developmental approach to mental retardation. In the present study, a third way, the similar-trajectory hypothesis, is described and illustrated using the WAIS-R results of adults with and without mental retardation aged from 20 to 54 years. The whole sample (N…
Descriptors: Mental Retardation, Cognitive Development, Adults, Control Groups

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