Mental defectiveness

Definition and stakes

Portrait of Lewis M. Terman Lewis M. Terman,  The measurement of intelligence

“ This is highly important in the diagnosis of the upper range of mental defectiveness. The criterion of the subnormal’s fitness for life outside an institution is his ability to understand social relations and to adjust himself to them. Failure of a subnormal to meet this criterion may lead him to break common conventions, and to appear disrespectful, sulky, stubborn, or in some other way queer and exceptional. He is likely to be misunderstood, because he so easily misunderstands others. The skein of human motives is too complex for his limited intelligence to untangle. ”
Source: Gutenberg

Herman M. Adler,  Psychiatric Contribution to the Study of Delinquency (1917)

“ Feeble-minded persons, that is to say persons in whpse cases there exists from birth or from an early age mental defectiveness not amounting to imbecility, yet so pronounced that they require care, supervision and control for their own protection or for the protection of others, or in the case of children, that they by reason of such defectiveness appear to be permanently incapable of receiving proper benefit from the instruction in ordinary schools. ”
Source: Wikisource

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