Objective: Identification of differences among children with ADHD only, autism spectrum disorder (ASD)+ADHD, and chronic multiple tic disorder (CMTD)+ADHD may lead to better understanding of clinical phenotypes. Method: Children were evaluated using the parent- and teacher-completed questionnaires. Results: All three groups were highly similar in…

Data from Terman's "Genetic Studies of Genius" (1925-1959) relating to sample size, mean IQ, and variance of IQ scores were analyzed in terms of their conformation to the theoretically projected statistics derived from a consideration of the normal curve. (Author/RC)

The author, a psychologist, concerned himself with the question of whether mental growth and decay are fixed in each of us by heredity, that is by our genes, or how far they are influenced by upbringing, education, and other factors in our environment. (Author/RK)

The basic differences between the sexes are, after all, genetic rather than social or cultural. Article investigated the implications of this fact for teachers and learners. (Editor/RK)

Ethical issues which surround the reproductive technologies being used to assist infertile couples include social impact, surrogacy, access to service and confidentiality. The use of reproductive technologies does not appear to cause harm, and often does a lot of good for the family and society. Surrogacy could be a valuable tool for the infertile…

Author focused on differences between whites and negroes in the United States and more generally on racial variation in man. (Author/RK)

Presented is the case history of a boy with a previously unreported pattern of upper limb deformities and minor craniofacial anomalies. (DB)

The case is presented of a young boy with a rare chromosome disorder involving an interstitial deletion on chromosome 16 (16q11.2q13). Background information on chromosome disorders is presented along with a review of previous findings about the developmental consequences of chromosome 16q deletions. The case description illustrates the…

Presents a few pertinent facts related to contrasting conditions in Mendel's experiment. The lack of emphasis regarding normal vs abnormal conditions or the origins of the abnormal type is questioned. Suggested contrasts are given. (EB)

Paper presented at the Merrill-Palmer Institute on Research and Training of Infant Development (Detroit, Mich., Feb. 15-17, 1968).

To account for observed sex differences on tasks such as the rod and frame test, the embedded figures test, and other related measures, the theory is advanced that a sex-linked recessive gene mediates or facilitates certain performances. This assumption is coupled with the concept of "a mixture of density functions" to provide a…