Evaluating the Relationship between the Rate and Temporal Distribution of Self-Injurious Behavior

Area of Science:

• Behavioral Psychology
• Intellectual Disabilities Research
• Applied Behavior Analysis

Background:

• Self-injurious behavior (SIB) poses treatment challenges, with some forms proving resistant to interventions.
• Current research often focuses on the frequency of SIB, with less emphasis on the temporal patterns between occurrences.
• Understanding the inter-response times (IRTs) is crucial for developing effective treatment strategies.

Purpose of the Study:

• To investigate the relationship between changes in the rate of SIB and its temporal distribution.
• To assess the impact of systematically manipulated environmental variables on both SIB rate and IRTs.
• To determine if antecedent manipulations affect the clustering of SIB episodes.

Main Methods:

• Employed a multiple baseline design across two participants with SIB maintained by negative and automatic reinforcement.
• Utilized a reversal design for a third participant to evaluate the impact of daily schedule changes on SIB.
• Measured both the rate of SIB and operant contingency values (a measure of temporal distribution).

Main Results:

• Antecedent manipulations led to a decrease in the overall rate of SIB for all three participants.
• Operant contingency values, reflecting the temporal distribution of SIB, did not change in parallel with the rate reductions.
• These findings indicate that SIB instances tend to occur in close succession, even when the overall frequency is reduced.

Conclusions:

• Antecedent-based interventions can effectively reduce the overall frequency of self-injurious behavior.
• Reductions in SIB rate do not necessarily alter the tendency for subsequent SIB to occur shortly after.
• Further research is needed to address the temporal clustering of SIB to improve treatment efficacy.