The purposes of the present study are to try to establish whether perception and motor skill are determinant factors of performance on the Bender-Gestalt Test and to investigate the degree of relationship and importance of each factor on the B-G-T.

The purpose of this study is to investigate, empirically, the response of the severely mentally retarded to different types of music, tonic and sedative, as well as responses during "quiet" periods.

It has not yet been demonstrated that music can be used therapeutically with profoundly retarded children. One way these children might be helped to respond to music, and therapeutically benefit from it, would be to use operant conditioning in an effort to enhance gross motor activity and then progressively shape responses until more complex behavior patterns are formed. Once these children can respond motorically in the presence of musical stimuli, continuation of responding may be possible by pairing motor activity with musical stimuli. This experiment investigated the effects of operant conditioning and music on the motor activity of profoundly retarded children in an effort to determine the therapeutic usefulness of music with such children.

The design of this experiment was developed to investigate the presence of success-striving and failure-avoidant motivational patterns in the level of aspiration behavior of retarded subjects. The primary objective of this study is to show that success-strivers are present in mentally retarded groups, even if in the minority.