Patterns of maintenance of ability across the life span have been documented on tests of knowledge (Gc), as have patterns of steady decline on measures of reasoning (Gf/Gv), working memory (Gsm), and speed (Gs). Whether these patterns occur at the same rate for adults from different educational backgrounds has been debated. In addition, age-related research is needed to study global IQs, especi...

The Native American population is severely underrepresented in empirical test validity research despite being overrepresented in special education programs and at increased risk for psychoeducational evaluation. The structural validity of the Wechsler Intelligence Scale for Children – Fourth Edition (WISC-IV) was investigated with a sample of 176, six-to-sixteen-year-old Native American childre...

Recent studies support several overlapping traits between autism spectrum disorders (ASD) and attention-deficit/hyperactivity disorder (ADHD), assuming the existence of a combined phenotype. The aim of our study was to evaluate the common or distinctive clinical features between ASD and ADHD in order to identify possible different phenotypes that could have a clinical value. We enrolled 181 sub...

Methods We prospectively assessed cognitive functioning in 10 children with classic infantile Pompe disease who had been treated with ERT since 1999. Until 2004, infants and young children were assessed with the Bayley Scales of Infant Development (BSID-II; number of tests = 23). After 2004, we switched to the Griffiths Mental Developmental Scales (Griffiths; number of tests = 19), expecting it...

AIM Cerebral palsy (CP) is defined as a primary disorder of posture and movement; however, approximately 45% of children with CP also have an intellectual impairment. Prevalence estimates are limited by a lack of guidelines for intelligence testing. This systematic review aims to identify and examine intelligence assessments for children with CP. METHOD Electronic databases (PubMed, PsycINFO,...

KBG syndrome is a neurodevelopmental disorder (NDD) caused by loss-of-function of the ANKRD11 gene. The core phenotype comprises developmental delay (DD)/ intellectual disability (ID) and several specific facial dysmorphisms. In addition, both ADHD- and ASD-related symptoms have been mentioned. For the correct understanding of these developmental and behavioral characteristics however, it is of...

OBJECTIVE This study aimed to examine the cognitive profiles of children with Attention Deficit and Hyperactivity Disorder (ADHD) with the Wechsler Intelligence Scales for Children-Revised (WISC-R) and the Wechsler Intelligence Scales for Children-Fourth Edition (WISC-IV), the latter of which was recently standardized in Turkey. In addition, the reading abilities and intelligence scores of thes...

BACKGROUND It has been hypothesised that people with anorexia nervosa have a higher intelligence quotient (IQ) level than the general population. The purpose of this review was to systematically appraise the research into reported IQ levels in people with anorexia nervosa. METHODS A search using the terms intelligence quotient, IQ, intelligence, cognition, eating disorders and anorexia was co...

OBJECTIVE To examine associations between amounts of fatty acid ethyl esters (FAEEs) in meconium and cognitive development in school-aged children exposed to alcohol and drugs in utero. STUDY DESIGN A secondary analysis of a prospective cohort of children, primarily African American and of low socioeconomic status, that was recruited at birth. FAEEs were quantified with gas chromatography via...