Colby K M, Kraemer H C
J Autism Child Schizophr. 1975 Jun;5(2):139-46. doi: 10.1007/BF01537930.
A method is described for recording a child's performance with a computer-controlled audio-visual device designed to stimulate language behavior in nonspeaking children. From the recorded data a child's position can be estimated on a curve derived from normal children. This position could be of value in planning treatment for a nonspeaking child and assessing his progress.