The findings were published in the article, «A closer look at the role of parenting - related influences on
verbal intelligence over the life course: Results from an adoption - based research design,» in the journal Intelligence.
While
intelligence as psychological construct is assumed to be stable
over time, it has been suggested that WISC - III subtests may be less stable than global IQ (for more information about long - term stability of the WISC - III see Canivez and Watkins 2001; for a general discussion see Moffitt et al. (1993) and repeated
verbal IQ testing during childhood has revealed considerable change within individuals, reflecting different rates of developmental maturation, and, specifically, language development (Breslau et al. 2001).