Findings of the present experiment reveal that discrimination processes play an influential role in nonreinforced imitation in severly retarded children. (WY)

Study findings show that the performance of 72 Negro and 72 white children was influenced by individual variations in the personal characteristics of the adults with whom they were interacting in task situations rather than by the adults' race. Further, this influence was relatively constant for both Negro and white children. (Author/WY)

Thirty-six pairs of 4-year-olds played a game which required cooperative interaction in order to get prizes. Subjects were highly responsive to the cue of limited reward and relatively insensitive to the necessity of mutual assistance and the possibility of sharing by taking turns. (Author/WY)

Three investigations are reported which indicate that infants between 4 and 17 weeks of age are able to detect some differences in sounds upon which phonemic contrasts are based. (Authors)

The results of four experiments comparing the behavior of children from two settings are reported in this article. (Authors)

Implications of the findings for the programming of institutions for the retarded are discussed. (Authors)

The development of multiplicative classificatory skills in children between 4 and 9 years of age was investigated by means of two forms of the matrix-completion task. (Authors)

The ability to order objects in a series according to some dimension, such as size, is recognized as an important aspect of a child's ability to understand logical concepts. (Author)

In the present study, the authors collected data that would help resolve the controversey between developmental and defect theorists of mental retardation. (Authors/RY)

Asking a child what he would wish for if he had three wishes formed the basis of this study. (Author/RY)

The expectation that an effective conservation training procedure would be one in which the child was confronted with opposing points of view was investigated in an experiment and a replication experiment in which the child's point of view was brought into conflict with those of other children. (Author/RY)