Operant Management of the Behavioural Sequelae of Wilson's Disease: A Case Report*

An approach to the management of the behavioural manifestations of Wilson's Disease by operant technique is outlined. There was considerable improvement in the patient's ability to perform autonomously on this program. When the contingencies were changed the patient's behaviour deteriorated markedly, thereby suggesting that improvement in behaviour was not due to medication alone.

Infants' Discrimination of Moving and Stationary Objects

An operant technique was used to train 10-wk.-old infants on a simultaneous discrimination task with a checkerboard cube and a bull's-eye sphere presented in a stationary form. Discrimination testing with the objects in motion and with the objects stationary indicated that infants are able to discriminate between simultaneously presented objects whether stationary or in motion. The results are contrasted to T. G. R. Bower's assessment of infants' utilization of features in perceiving moving objects.

Use of the Slide Show Audiometric Technique with Mentally Retarded Children

Because of the apparently high incidence of hearing impairment and difficult to test subjects among the retarded, there is a need to continually strengthen our audiologic assessment armamentarium. This paper (a) discusses the instrumental (or operant) conditioning audiometric technique called the peep show, (b) presents the slide show as an inexpensive means of using this operant technique, (c) considers the use of the slide show technique with mentally retarded children, and (d) compares the slide show to previously reported operant conditioning techniques of this type.