Biomedical subjects

J E Ringdahl

Publications and source records attributed to J E Ringdahl.

7 recordsLinked to original sources

PubMed2001

An experimental analysis of aggression.

Iwata, Dorsey, Slifer, Bauman, and Richman developed an assessment method to identify the operant functions of self-injurious behavior. In this study, a similar method was used to assess the operant functions of aggression displayed by children and adolescents with developmental disabilities. Although previous research has shown that aggression is an operant behavior, there has been no comprehensive analysis of aggression using analog functional analysis method. Eight children and adolescents participated. The experimental conditions involved attention, escape, materials, no interaction, and control. Results for 7 of the 8 participants identified clear operant functions (positive or negative reinforcement) for aggression. For 1 child, subsequent analyses suggested that aggression was possibly sensitive to peer attention as reinforcement.

Adolescent↗

PubMed2001

Fixed-time schedule effects as a function of baseline reinforcement rate.

Using an arbitrary response, we evaluated fixed-time (FT) schedules that were either similar or dissimilar to a baseline (response-dependent) reinforcement schedule and extinction. Results suggested that both FT schedules and extinction resulted in decreased responding. However, FT schedules were more effective in reducing response rates if the FT reinforcer rate was dissimilar to baseline reinforcer rates. Possible reasons for this difference were evaluated with data analysis methods designed to identify adventitious response-reinforcer relations.

Adolescent↗

PubMed2000

The effects of different adults as therapists during functional analyses.

The differential effects of caregivers and inpatient staff members as therapists on behavior were evaluated within a reversal design. Results indicated that problem behaviors were higher in the presence of caregivers relative to inpatient staff. These results are discussed in terms of how antecedent stimuli can affect functional analysis outcomes.

Adult↗

PubMed1998

Evaluation of a brief stimulus preference assessment.

We evaluated the utility of a brief (5-min) stimulus preference assessment for individuals with developmental disabilities. Participants had noncontingent (free) access to an array of stimuli and could interact with any of the stimuli at any time. Stimuli were never withdrawn or withheld from the participants during a 5-min session. In Experiment 1, the brief preference assessment was conducted for 10 participants to identify differentially preferred stimuli, and reinforcer assessments were conducted to test the reinforcing efficacy of those stimuli identified as highly preferred. In Experiment 2, a comparison was conducted between the brief preference assessment and a commonly used paired-stimulus preference assessment. Collectively, results demonstrated that the brief preference assessment identified stimuli that functioned as reinforcers for a simple operant response, identified preferred stimuli that were differentially effective as reinforcers compared to nonpreferred stimuli, was associated with fewer problem behaviors, and required less time to complete than a commonly used paired-stimulus preference assessment.

Adolescent↗

PubMed1997

Negative side effects of noncontingent reinforcement.

Noncontingent reinforcement (NCR) has emerged as a treatment package for severe behavior problems. Although concerns about potential side effects (such as incidental reinforcement) have been raised, there have been few reported negative side effects in published studies to date. In this article, we report an NCR treatment evaluation for severe aggression that produced (a) an extinction burst and (b) incidental reinforcement. These side effects were evaluated by examining within-session response patterns and response distributions. As a solution, a brief omission contingency was added to the reinforcement schedule. The omission contingency resulted in decreased aggression rates.

Adolescent↗

PubMed1995

Noncontingent escape as treatment for self-injurious behavior maintained by negative reinforcement.

We extended research on the role of noncontingent positive reinforcement following a functional analysis of attention-maintained self-injurious behavior to self-injury maintained by negative reinforcement in 2 young males with developmental disabilities. During a pretreatment functional analysis, each participant's self-injury was shown to be differentially sensitive to escape from instructional activities as negative reinforcement. During noncontingent escape, escape from learning activities was provided on a fixed-time schedule that was not influenced by the participant's behavior. One participant was also exposed to differential negative reinforcement of other behavior. During this condition, escape from instructional activities was provided contingent on the omission of self-injury for prespecified intervals. Results showed that the provision of escape, even when noncontingent, resulted in significant reductions in self-injury. These results are particularly interesting in light of the experimental history of noncontingent reinforcement as a control rather than as a therapeutic procedure. Noncontingent escape is discussed as a form of extinction that may be less likely than other forms of extinction to produce severe side effects.

Adolescent↗

PubMed1995

Progressing from brief assessments to extended experimental analyses in the evaluation of aberrant behavior.

The role of experimental analyses in guiding treatment is well established. However, not all experimental analyses yield conclusive results. Outcomes may be inconclusive due to time limitations that preclude extended observation and detailed experimental manipulations, or may result from interactions across experimental conditions, multiple control, or other unknown factors. In this study, we describe an assessment sequence that moves through four phases beginning with relatively brief (1 to 2 hr) analyses and culminating in extended analyses that may control for experimental confounding effects (e.g., interaction effects). Data illustrating the model are presented for 20 individuals referred for severe behavior problems including self-injury, aggression, stereotypy, and tantrums. Analyses were considered to be complete only when clear and replicable response patterns emerged. Results showed that clear and replicable response patterns emerged for 85% of the participants.

Journal Article↗