The Measurement of Intelligence

The Freedom-From-Distractibility Factor: an Examination of Its Adaptive Behavior Correlates

“…In a majority of these analyses, the two factors correspond closely to Wechsler's a priori division of the scale into Verbal and Performance sections (Silverstein, 1969(Silverstein, , 1977(Silverstein, , 1980. This factor, however, has proven to be less robust and less invariant across different clinical samples (Berger et al , 1964;Groff & Hubble, 1982;Kaufman, 1979;Reed & Fitzhugh, 1967;Rugel, 1974;Silverstein, 1970). In addition to the Verbal and Performance factors, a number of studies have extracted a third factor (Baumeister & Bartlett, 1962a, 1962bBerger, Bernstein, Klein, Cohen, & Lucas, 1964;Cohen, 1952Cohen, , 1957Cohen, , 1959Russell, 1972;Van Hagen & Kaufman, 1975).…”

“…In all analyses, raw scores rather than standardized scores were employed because of problems in both the norms of the ABS (McDevitt, McDevitt, & Rosen, 1977;Roszkowski & Bean, 1980) and the WAIS (see Silverstein, 1970). The summary statistics for the present sample on these scales are presented in Table 1.…”

Effect of observational training of parents in the early stimulation of trisomy‐21 babies

“…With regard to language, various studies have shown that DS babies display less receptiveness and initiative in their interactions with their mothers (Jones, 1980;Field, 1979) and, later, a slow lexical development (Zeaman and House, 1962;Share et al, 1964;Fishier et al, 1964;Share, 1975;Thompson, 1963;Silverstein, 1970). Likewise other researches have shown that the DS children show a drop in language level in relation to what can be expected of their mental age -MA- (Rondal, 1975 andCardoso-Martins, Vernis and Mervis, 1985;Levi and Zollinger, 1981).…”