Prediction of Developmental Outcome at Seven Years from Prenatal, Perinatal, and Postnatal Events

Perinatal, Home Environment, and Infant Measures as Successful Predictors of Preschool Cognitive and Verbal Abilities

“…The longitudinal sample of 53 female and 41 male children was subdivided into ''low-risk'' and ''high-risk'' groups based on perinatal risk scores. Results at 3 and 4 years of age are similar to those reported by Siegel (1982) and Smith, Flick, Ferriss, and Sellmann (1972), despite the use of a sample in the present study which did not have the extreme perinatal risk conditions found in samples used by previous investigation s. The classi cation accuracy achieved using the Siegel Risk Index and SES item s was high for both risk and age groups. The use of the HOME subscale scores generally resulted in improvements, particularly in classi cation accuracy.…”

“…In contrast, two reports (Siegel, 1982a,b;Smith et al, 1972) have contained promising results when a combination of perinatal variables and measures of socioeconomic status (SES) were used as individual predictors rather than as summed scores. Both studies report that high predictability and high classi cation accuracy can be achieved for risk and normal children in investigation s of intelligence and language development .…”

What has caused the Flynn effect? Secular increases in the Development Quotients of infants

“…These correlations are not corrected for measurement error and range restriction, so these are underestimates of their true population values. Further evidence for a positive relationship between DQs and IQs has been provided by Smith, Flick, Ferriss, and Sellman (1972) and Rubin and Balow (1979) who have reported that Bayley DQ at 8 months predicts IQ at age 6 and 7, and at age 4 and 7, respectively.…”

Discriminant Analysis

“…A variation of this use of MANCOVA to select the most effective discriminators is given in a study by Horton, Russell, and Moore (1968). (See also, Smith, Flick, Ferriss, & Sellmann, 1972.) Hotelling's trace statistic was used as a criterion for selecting variables in a forward manner by Miller (1962).…”