Studies have evaluated a range of interventions to treat food selectivity in children with autism and related developmental disabilities. The high-probability instructional sequence is one intervention with variable results in this area. We evaluated the effectiveness of a high-probability sequence using 3 presentations of a preferred food on…

Conditional discrimination is inherent in the intraverbal relation when one verbal stimulus alters the evocative effect of another verbal stimulus and they collectively evoke an intraverbal response. Rarely in research on conditional discriminations have both conditional and discriminative stimuli been vocal verbal and rarely have the responses…

This commentary on the use of gentle teaching with individuals with developmental disabilities examines the method's assumptions, describes its use of behavioral techniques, and criticizes its ineffectiveness. (JDD)

The principle of motivation has resurfaced as an independent variable in the field of behavior analysis over the past 20 years. The increased interest is the result of the refinements of the concept of the motivating operation and its application to the learning needs of persons with developmental disabilities. Notwithstanding the increased…

Rates of verbalizing by three children exhibiting moderate to severe language delays (delays of six months to two years) were increased through the systematic use of mands for verbalization, models for verbalization, and contingent positive consequences following utterances. Daily samples of each child's speech were collected during free play…