Gross-motor skill acquisition by preschool dance students under self-instruction procedures

The effects of two training procedures--(a) modeling and praise and (b) self-instruction, modeling, and praise--on complex gross-motor chain acquisition for preschool dance class students were evaluated. Six girls participated in the study. A multiple baseline design across six gross-motor chains with a secondary group comparison for treatment order effects was used. Both procedures were effective in teaching the gross-motor chains. Nevertheless, for 4 of the 6 participants, the self-instruction procedure produced a faster acquisition rate in at least two of the three comparable pairs of gross-motor chains. Furthermore, very early in gross-motor chain acquisition, for five of the six gross-motor chains, the self-instruction condition was associated with faster response acquisition.     

The effects of response interruption,DRO and positive reinforcement on the reduction of hand-mouth behavior

The present study was designed to determine the effects of response interruption and differential reinforcement of other behavior (DRO) on the reduction of hand-mouthing behavior in a quadriparesic adult male client who functions at the profound level of mental retardation. In order to determine the effectiveness of the treatment package, a withdrawal design was used in which baseline (A) and treatment (B) conditions were alternated in an ABAB sequence. The treatment phase consisted of two 10 min treatment periods per day for four consecutive days. Two treatment/withdrawal rotations were followed by nine follow-up observation periods. A preliminary fading process was started following the follow-up periods, which included removal of the reinforcer. Hand-mouthing was reduced by 80% through the use of response interruption and DRO. Hand-mouthing continued to decrease during the nine follow-up observation periods and formal fading procedure. Implications for the extended use of such nonaversive procedures to decrease hand-mouthing behavior in persons with developmental disabilities are discussed. © 1997 John Wiley & Sons, Ltd.     

Generalized imitation of facial models by children with autism

Imitation is an essential skill in the acquisition of language and communication skills. An initial phase in teaching young children with autism to engage in appropriate affective responding may be to teach the imitation of facial models. Using a multiple baseline across participants design, imitation training (consisting of modeling, prompting, differential reinforcement, and error correction) was introduced successively across 3 participants. Low and inconsistent rates of imitation of facial models were observed in baseline. All of the participants learned to imitate some of the facial models presented during imitation training, but only 2 of the 3 participants demonstrated generalized responding across stimuli.     

Generalized imitation in infants

Effects of modeling and contingent praise on infant's motor response topographies were experimentally analyzed. Three 10-month-old male infants and their mothers participated in 20-min. experimental sessions two to four times a week for 2 to 7 months. During each session a mother presented her infant with 15 toys randomly selected from a pool of 45. The infant was allowed to play with each toy for 1 min. During treatment the mother modeled prescribed responses with each toy, and during 10 training trials per session, she praised her infant if he emitted topographically similar responses. Interspersed among training trials were five probe trials for which praise was seldom available. All three infants showed systematic increases in the targeted training and probe response topographies following the introduction of the modeling and praise treatment procedure. Thus, responding during probes demonstrated generalized imitation with infants, a new and developmentally important population.     

GENERALIZED IMITATION AND RESPONSE-CLASS FORMATION IN CHILDREN WITH AUTISM

An experimental analysis of imitation was conducted to examine the influence of response topography on generalization of imitation across three response types. Four children with autism were presented with both reinforced training trials and nonreinforced probe trials of models from vocal, toy-play, and pantomime response types. The probe trials were used to examine generalization within each response type. A multiple baseline design was used to analyze percentage of matching and nonmatching responses to models across response types. This study, the first to analyze imitative response classes in children with autism, showed that imitation generalized from reinforced training models to nonreinforced probe models within a response type, but it did not generalize across response types. Thus, functional response classes determined by topographical boundaries were exhibited within generalized imitation.