Goals: This study examined: (a) crystallized/fluid intelligence trajectories of adolescents and adults with Down syndrome; and (b) the contribution of endogenous (health, activities of daily living--ADL) and exogenous (cognitively stimulating leisure activities) factors on adults' intelligence with age. Method: Four cohorts (N = 80) with Down…

Previous research showed that in primary school, children's intelligence develops continually, but creativity develops more irregularly. In this study, the development of intelligence, measured traditionally, i.e., operating within well-defined problem spaces (Standard Progressive Matrices) was compared with the development of intelligence…

Jaeggi and her colleagues claimed that they were able to improve fluid intelligence by training working memory. Subjects who trained their working memory on a dual n-back task for a period of time showed significant improvements in working memory span tasks and fluid intelligence tests such as the Raven's Progressive Matrices and the Bochumer…

Existing literature shows promising effects of physical activity on children's cognitive outcomes. This study assessed via a randomized, controlled design whether additional curricular physical activity during the school day resulted in gains for children's fluid intelligence and standardized achievement outcomes. Participants were children…

In 19 (sub)samples from seven countries (United States, Austria, Germany, Costa Rica, Ecuador, Vietnam, Brazil), we analyzed the impact of parental education compared with wealth on the cognitive ability of children (aged 4-22 years, total N = 15,297). The background of their families ranged from poor indigenous remote villagers to academic…

In our prior study the negative correlation between Topology, a behavioral measure of fluid reasoning, and adult age diminished with the increase in the level of expertise in a cognitively-demanding domain of expertise in the game of GO. The present fMRI study was designed to investigate neural substrates of Topology. The modified topology…

Researchers have examined inductive reasoning to identify different cognitive processes when participants deal with inductive problems. This article presents a prescriptive theory of inductive reasoning that identifies cognitive processing using a procedural strategy for making comparisons. It is hypothesized that training in the use of the…

To investigate the role of early context in theory of mind development, institutionalized children living in a boarding home (n = 34) in Turkey were compared to home-reared children coming from low (n = 32) and middle socioeconomic backgrounds (n = 44). Theory of mind was assessed with one deception and three false belief tasks; Peabody PVT and…

Prenatal exposure to the Dutch famine of 1944-45 had no detectable effects on the adult mental performance of surviving male offspring; birth weight was not related to mental performance; and the association of social class with mental performance was strong. (AL)

Mothers were asked to predict their children's responses to standardized intelligence test items. Negative correlation was expected between inaccurate maternal knowledge of children's ability and degree of children's psychological development. False maternal predictions correlated - .80 with correct children's responses. Nearly all of the…

Raven's Progressive Matrices test items were analyzed for M demand (Pascual-Leone's developmental construct). Data on second- and third-grade subjects were analyzed for extent of absolute agreement of Raven and Figural Intersection Test (FIT) scores. Raw scores on the Raven could be deduced on the basis of FIT performance. (Author/RD)

The degree to which reading ability and intelligence, as measured by the Raven Progressive Matrices Test, were related was studied for 486 students in grades 2 through 12 in a small town, rural school system. Results indicate the strong and consistent relationship between general intelligence and reading ability. (SLD)

Examined whether Inuit children enter school with reduced intellectual skills and tested the possibility that environmental factors in the educational environment serve to disrupt or slow Inuit children's cognitive development. Findings show no deficiency in intellectual capacity at time of school entry. Factors affecting academic underachievement…

It is widely accepted that within certain biological limits, a child's development emerges out of a continuous and increasingly complex interaction with significant people in his or her environment. Mothers and other significant adults, as experienced members of the culture, may be viewed as mediators and tutors who transmit cultural knowledge and…