Teaching Discriminative Use of an Encoding Electronic Communication Device and Signing Exact English to a Moderately Handicapped Child

A 13-year-old communicatively and intellectually delayed male was taught to use discriminatively each of two previously acquired augmentative systems that consisted of signing and direct select letter encoding. Procedures used resulted in the use of signs with signers and direct select encoding with nonsigners. The learner's selection of the most appropriate communication modality generalized to new persons and environments.