[1] William Van Ornum, Linda Dunlap, and Milton Shore provide a detailed description of the McCarthy Scales of Children's Abilities in Psychological Testing Across the Lifespan.
[3] Van Ornum et al. (2008) emphasize that a key contribution of McCarthy was creating a test measuring "cognitive ability" rather than "intelligence."
In fact, the concept of combining various subtests to form a composite score is such an important idea that it has become one of the main features in the 2003 fifth edition of the Stanford-Binet scale.
"[1] This study produced findings that suggested that "individual differences in autistic traits are substantially genetically independent of intellectual functioning.
The study found that children from different contexts and countries receive substantial cognitive, behavioral, health, and schooling benefits from early childhood interventions.
"[1] Another study used the McCarthy Scale to "show that pre-term birth, parental age, and infant gender accounted for more than 30% of the variance in cognitive-motor skills.
"[1] Still another study used the McCarthy Scale to "assess the effect of the mode of delivery (vaginal or caesarean section) on the long-term psychomotor development of extremely low-birth weight infants.