Questionnaires completed by 83 families of autistic children (5-23 years old) revealed that significantly more autistic children were non-right-handers than either their siblings or their parents. Findings suggest that increased mixed- and left-handedness in autistic persons is not due to inheritance. (CL)

The article discusses the genetic causes of deafness. (Author/DLS)

One interpretation of the Pearson product-moment correlation ("r"), correlation as the probability of originating from common descent, important to the genetic measurement of inbreeding, is examined. The conditions under which "r" can be interpreted as the probability of "identity by descent" are specified, and the…

This biography explores the many scientific interests and contributions of Francis Galton and outlines his psychological studies as a "detour" from his major works that lasted from 1877 to 1885. Galton's interest in heredity was a focus of the second half of his life, the first having concentrated on geography and exploration. (SLD)

Reviews family, linkage, and twin studies of reading disability. Reports on application of behavioral genetic methods to reading performance data from 96 identical twin pairs and 72 fraternal twin pairs in which at least one twin was reading disabled. Found approximately one-half of the reading deficit observed in the probands may have been…

A behavioral genetic analysis of general writing ability was conducted using teacher assessments based on UK National Curriculum criteria for a sample of 3296 same-sex pairs of 7-year-old twins. Writing was highly heritable within the normal range (0.66) and at the low extreme (0.70). Environmental influences were almost all non-shared, with…

The relation between intelligence and birth order was shown in a recent publication [Bjerkedal, T., Kristensen, P., Skjeret, G. A. & Brevik, J. I. (2007). Intelligence test scores and birth order among young Norwegian men (conscripts) analyzed within and between families. "Intelligence," 35, 503-514] to be negative. Subjects in this…

Evidence and research indicate that the majority of cases of coronary artery disease represent familial disorders which are best explained by a polygenic hereditary predisposition interacting with emotional triggers such as diet and stress. Early identification is judged necessary. (Authors/JA)

Research in manipulation of genetic inheritance opens new vistas. Biologically-styled industrial synthesis is better in many respects than chemical engineering practices now in use. An approach for improving hereditary characters in living organisms without considering social implications is unwise. (PS)

Reviewed are the basic diagnostic features of 12 types of hereditary hearing loss with no associated abnormalities. (KW)

The presence of three or more minor and/or major anomalies in an individual with mental retardation may indicate not just a developmental relationship between the retardation and malformation syndromes, but a common cause for the entire retardation malformation syndrome. Tables, Bibliography. (Author)

A portion of the paper was presented at the 1969 International Congress of Psychology in London. (Author)

Assessed the heritability of response to exercise training in resting blood pressure (BP) and heart rate (HR) among sedentary Caucasians comprising 98 families who completed an exercise training program. Results indicated that the trainability of systolic BP and HR in families with elevated BP was partially determined by genetic factors. Diastolic…