The relative influence of scholastic achievement, intelligence, athletic ability, and ethnic origin on the formation of friendships among pupils in two Israel elementary schools was explored. The most important factor was found to be similar academic achievement, followed by intelligence and athletic achievement. (Authors/PP)

Areas of agreement and disagreement concerning intellectual developmental and the problems of mental retardation espoused by the author and by Uzgiris are discussed in this paper. The importance of environmental factors, along with the genetic and/or constitutional nature of the organism on which these environmental events impinge, is seen as…