The most pressing problems of research on minority groups have not received adequate attention. One such problem is that of identification and understanding of the mechanisms of learning facility and learning dysfunction and the implications of both for the optimum development of heterogeneous populations. Secondly, in contrast to the body of…

Current theories of intellectual development claim that such development proceeds through invariant sequences of increasingly more adequate cognitive structures. According to the two dominant theories on changes in intellectual functioning during adulthood, intellectual development is essentially accomplished by adolescence, although sharpening…

Research and clinical findings indicate that psychologists need to be particularly aware of the variations between the cultural experience of the Native American and the Anglo child. Specific recommendations are presented concerning intellectual assessment of the Native American child. (Author/MH)

The recent phenomenon of the "returning adult" to colleges has raised concern regarding two implications: age decline in intellectual ability and loss due to lack of practice. Literature indicates slight impairment of the problem-solving function until the years of advanced age. The degree of impairment is related to factors of educational…