The behavioural phenotype of velocardiofacial syndrome (VCFS), one of the most common human multiple anomaly syndromes, includes developmental disabilities, frequently including intellectual disability (ID) and high risk of diagnosis of psychotic disorders including schizophrenia. VCFS may offer a model of the relationship between ID and risk of…

Aim: To review systematically the neurodevelopmental characteristics of individuals with sex chromosome trisomies (SCTs). Method: A bibliographic search identified English-language articles on SCTs. The focus was on studies unbiased by clinical referral, with power of at least 0.69 to detect an effect size of 1.0. Results: We identified 35…

By reviewing studies relating memory to verbal comprehension and describing a sentence verification task study, the author examines the relationship, in normal subjects, between information processing capacities and intelligence. He proposes three sources of individual differences in information processing: basic functions, choice of problem…

The author reports on recent Soviet studies of developmentaly delayed (DD) children, which compare clinical characteristics of DD, mentally retarded, and normal children relative to such aspects as attention, memory, intellectual functioning, and verbal facility. Noted is the similarity of DD children to American learning disabled children.…

If microcomputers are used as automated testing stations, for use in psychometric assessment, there are economic advantages. Discussion follows, however, on whether it is possible to improve the quality of cognitive assessment by extending the range of cognitive abilities to be assessed. Two types of extension are considered: modifying and…