Few studies have investigated associations of milestone development in early childhood with intelligence in adulthood in typically developing children. The current study is an extension of 2 previous studies on smaller samples and investigated associations of age at attainment of 32 developmental milestones attained between 0 and 3 years of age…

Many Flynn effect (FE) studies compare scores across different editions of Wechsler's IQ tests. When construct changes are introduced by the test developers in the new edition, however, the presumed generational effects are difficult to untangle from changes due to test content. To remove this confound, we use the same edition of Wechsler…

Used the demographic variables of age, race, sex, education, occupation, region of residence, urban versus rural residence, and handedness in the prediction of premorbid IQs for the 1981 revised Wechsler Adult Intelligence Scale (N=1,880). Results indicated that the regression equations aid in accurate estimation of premorbid IQ. (LLL)

Assesses proposed new demographic information formulas for estimating premorbid Wechsler Adult Intelligence Scales-Revised Intelligence Quotient scores. Investigated cross-validation of this index on a neurologically normal but clinically relevant criterion group and determined the neuropsychological utility of the formulas to discriminate between…

The validity of a technique for estimating premorbid intellectual functioning based on Wechsler Adult Intelligence Scale-Revised (WAIS-R) subtest performance and demographic information used in best-performance fashion was investigated with the 1,880 individuals from the WAIS-R standardization sample. Results support use of the approach. (SLD)

Intelligence quotient (IQ) differences among groups according to sex, and demographic and other variables have been explored for a variety of intelligence tests. This investigation analyzed data from the standardization sample for the 1981 Wechsler Adult Intelligence Scale-Revised (WAIS-R) to determine the relationship of WAIS-R IQs to the…

The standardization sample of the Wechsler Adult Intelligence Scale-Revised (WAIS-R) was the basis for an analysis of the WAIS-R subscales in relation to demographic variables. Canonical correlation with orthogonal rotation of composite structural components was performed in order to determine interrelations between both sets of variables.…

Analyzed data from standardization sample of 1981 Wechsler Adult Intelligence Scale-Revised (WAIS-R) to determine relationships of WAIS-R intelligence quotients (IQs) to demographic variables upon which sample was stratified. Found significant differences in mean IQs due to race and education level; sizeable differences for occupational groups;…

Premorbid intellectual function estimation is a crucial part of patient evaluation following a traumatic brain injury (TBI), especially in individuals with ADHD who are at higher risk for TBI compared to their non-ADHD peers. This study investigates the value of using regression-based estimates of intelligence for concurrently predicting measured…

Background: Childhood onset schizophrenia (COS) is a rare disorder. Comparative data on the effect of differential age of onset on clinical profile in schizophrenia are very few. Method: Subjects with COS (n = 15), adolescence onset schizophrenia (AdOS, n = 20) and adulthood onset schizophrenia (AOS, n = 20) were compared on socio-demographic,…