Generalization of four retarded children's (five to eight years old) object naming responses to stimuli in the natural environment was assessed after training with either objects or pictures. Generalization was typically greater after training with objects. In a second experiment, an alternating procedure resulted in substantial increases in…

A six-year-old nonvocal girl with autism who had acquired a variety of signs and imitative responses consistently failed to acquire a tact (labeling) repertoire. When procedures to transfer stimulus control from verbal to nonverbal stimuli were implemented, the subject quickly learned to tact all 18 target stimuli. (Author/DB)