Biomedical subjects

John T Rapp

Publications and source records attributed to John T Rapp.

7 recordsLinked to original sources

PubMed2006

Toward an empirical method for identifying matched stimulation for automatically reinforced behavior: a preliminary investigation.

The effects of noncontingent matched stimulation (NMS) and response blocking on a boy's stereotypic behavior were evaluated using a multiple schedule that contained three 15-min components (preintervention, intervention, and postintervention). Results showed that stereotypy was always higher after response blocking than before response blocking and was always lower after NMS than before NMS. These results suggest that response blocking may have produced deprivation for the product of stereotypy and that NMS may have provided stimulation that was similar to the product of stereotypy.

Automatism↗

PubMed2005

Stereotypy II: a review of neurobiological interpretations and suggestions for an integration with behavioral methods.

Stereotypy is a relatively common behavioral disorder displayed by individuals with developmental disabilities, including autism. In this paper, we review selected studies on neurobiological interpretations of stereotypy and pharmacological interventions for stereotypy. Specifically, we review studies that evaluated the effects of serotonin uptake inhibitors (e.g., clomipramine) or opioid antagonists (e.g., naltrexone) on stereotypy displayed by humans. Throughout, suggestions are made for the incorporation of behavioral methods into this area of research.

Animals↗

PubMed2005

On the role of attention in naturally occurring matching relations.

Prior researchers have evaluated the efficacy of using the matching law to describe naturally occurring behavior-environment interactions. However, spurious matching could be obtained if the response and environmental event were correlated, even if the event did not reinforce the response. To assess the likelihood of obtaining spurious matching when relating attention and problem behavior, we evaluated the problem behavior of 3 participants for whom attention did not serve as a reinforcer for problem behavior in a functional analysis. Both the simple and generalized matching equations were used to examine matching relations extracted from descriptive observations that were conducted in the participants' classrooms. The results of aggregated matching analyses showed that the proportional rate of responding approximately matched the proportional rate of contiguous adult attention. Matching analyses conducted for all participants showed correlations between attention and problem behavior. These results demonstrate that spurious matching can be obtained, and they highlight the role of functional analyses in the analysis of naturally occurring matching relations.

Adolescent↗

PubMed2004

Functional analysis of erratic body movement maintained by visual stimulation. Incorporating conjugate reinforcement into a paired-stimulus preference assessment.

A concurrent-operants design was used to analyze the repetitive behavior of observing reflective surfaces while simultaneously engaging in erratic gross-motor body movements (EBMs) exhibited by a young boy diagnosed with autism. The assessment involved an evaluation of preference for controlled (i.e., the participant controlled the visual activity on a TV screen) versus uncontrolled (i.e., the participant viewed a previously recorded tape from the controlled condition) TV footage of his EBMs. The analysis indicated that both observing and EBMs were maintained by the direct correspondence between the body movements and the visual stimulation they produced when controlled by the participant. Thus, the EBMs appeared to be maintained on a conjugate schedule of reinforcement.

Autistic Disorder↗

PubMed2004

Evaluation of a vocal mand assessment and vocal mand training procedures.

A common deficiency in the verbal repertoires of individuals with autism and related disorders is the absence of socially appropriate vocal mands. The vocal mand repertoires of these individuals may be lacking in several respects: (a) The individual might engage in no mands whatsoever, (b) the mand might be topographically dissimilar to an appropriate response, (c) the mand might be only partially topographically similar to an appropriate response, and (d) the mand might occur only after prompting. Depending on specific deficiencies in an individual's repertoire, different procedures for establishing appropriate mands may be needed. The purpose of Study 1 was to evaluate an assessment prior to teaching vocal mands for 3 individuals with developmental disabilities. The assessment showed that 1 individual displayed partial utterances of mands, 1 displayed vocal mands after mands had been reinforced, and 1 displayed vocal mands when prompted. Thus, in Study 2, a different teaching strategy was tested for each individual. Results showed that the assessment information could be linked directly to mand training for all 3 participants.

Adolescent↗

PubMed2004

Analysis of response allocation in individuals with multiple forms of stereotyped behavior.

Three experiments were conducted to evaluate response allocation of stereotypy during free-operant and restricted-operant conditions. Five children with autism or related developmental disabilities participated in at least one and up to three of the experiments. In Experiment 1, the stereotypic response that emerged as most probable during a free-operant phase was restricted, and response allocation was again evaluated. The results for 3 participants showed that restricting the high-probability response was correlated with covarying reductions in a nontargeted stereotypy. In Experiment 2, the effect of environmental enrichment on response allocation was evaluated. One participant reallocated behavior to appropriate object manipulation, 1 participant showed no change in behavior, and a 3rd participant reallocated behavior to object manipulation only when the putative stimulus products of the object manipulation matched those of stereotypy. In Experiment 3, additional interventions were implemented to promote response reallocation. Results showed that both response restriction and reinforcement for object manipulation decreased stereotypy and increased object manipulation. Collectively, the results of these experiments point to a need for complex evaluations of interventions for stereotypy.

Child↗

PubMedDate not supplied

Stereotypy I: a review of behavioral assessment and treatment.

In this paper, we review definitional issues related to stereotypy, behavioral interpretations of stereotypy, procedures for determining operant function(s) of stereotypy, and behavioral interventions for stereotypy. In general, a preponderance of the assessment literature suggests that most forms of stereotypy are maintained by automatic reinforcement. Review of the treatment literature suggests that antecedent (e.g., environmental enrichment) and consequent (e.g., differential reinforcement of alternative behavior) interventions produce at least short-term reductions in stereotypy. Suggestions for further assessment and treatment of stereotypy are provided.

Behavior Therapy↗