Taxometric analyses have proven helpful for distinguishing categorical and dimensional data. Many taxometric procedures require at least 3 variables for analysis. What if a construct is defined by only 2 conceptually nonredundant characteristics or a data set contains only 2 empirically nonredundant variables? In Study 1, we performed extensive…

This study investigates the latent structure of individual differences in vocational, leisure, and family interests. The participants consisted of 302 French adults who rated their like or dislike for activities based on Holland's RIASEC typology and presented in three life domains: work, family and leisure. The multitrait-multimethod model…

Presented are 18 papers on problems in the psychology of mentally retarded children. Seven of the papers are in English, two in French, and nine in Russian. The English papers are concerned with the following topics: peculiarities of psychic functions in oligophrenic (retarded) children with pronounced underdevelopment of frontal lobes of cerebral…

This article is an abridged version of a British Psychological Society paper that addresses research relevant to current understanding of the notion of attention deficit hyperactivity disorder from an historical, psychological, and biological perspective. Also discusses implications for practice in the light of the information obtained. (Author/CR)