Reviews evolutionary, psychoanalytic, social learning, and cognitive developmental approaches to the development of altruism and proposes a framework that integrates the approaches. The four approaches are compared in terms of three general issues: the origin of altruism, the conception of altruism as a state or a trait, and individual differences…

In this research report, the influences of handedness, hand position while writing, and familial sinistrality (presence of left-handed relatives) on children's intellectual, reading, and visual-motor performance were investigated. Forty left- and right-handed children between the ages of 7 and 10 served as subjects. To assess hand positions, an…