Self-injury

The goal of this study is to develop and test an outpatient intervention for preadolescents (ages 7-12) with self-injurious thoughts and behaviors (SITBs). The main questions it aims to answer are: 1. Are the recruitment targets and study design feasible? 2. Is the new intervention feasible, acceptable, and appropriate? 3. Does the new intervention lead to more improvements in SITBs, mental health symptoms, and treatment targets relative to treatment as usual (TAU)? In Phase 1 (pre-implementation, months 1-6), enrolled preadolescent and caregiver dyads will receive TAU. In Phase 2 (post-implementation, months 7-13), enrolled dyads will receive the newly-developed SITB intervention. Participants will be recruited through referrals from the psychiatric emergency department at Children's Hospital Colorado. Participants will: 1. Complete an initial baseline assessment to determine eligibility and assess SITBs, mental health symptoms, executive functioning, and emotion regulation 2. Participate in an intervention lasting 6-12 weeks, including weekly or biweekly sessions 3. Complete additional assessments at post-treatment and 3-month follow-up 4. Participate in an interview sharing their perceptions of the intervention

Despite decades of mounting single-case-design evidence for the efficacy of applied behavior analysis (ABA) and other approaches for the assessment and treatment of challenging behavior, an evidence-based comprehensive approach remains to exist. The current study will collect test the efficacy of a standardized manual for assessing and treating challenging behavior for individuals with severe and mild challenging behavior.

Although highly effective, treatments like FCT include extinction, which can have adverse side effects. The extinction burst, an increase in the frequency or intensity of destructive behavior at the start of treatment, is the most common side effect of extinction, and can increase the risk of harm to the patient and others. The goal of the current study is to evaluate the prevalence of extinction bursts when various parameters of reinforcement (i.e., rate, magnitude, quality) are manipulated.

Although behavioral treatments for decreasing destructive behavior, such as differential reinforcement of alternative behavior (DRA), are effective in the clinic, problem behavior often returns when a caregiver does not give the child their way in the natural environment (e.g., caregiver is busy with an infant sibling). This form of treatment relapse is known as resurgence. The goal of the current study is to evaluate whether alternating sessions in which the child can have their way (i.e., "on" sessions) with sessions in which the child can not have their way (i.e., "off" sessions) helps to mitigate resurgence.

The goal of this clinical trial is to learn if propranolol can help reduce challenging behaviors associated with Autism Spectrum Disorder, including aggression, self-injury, and severe disruptive behaviors. Participants will be randomly assigned to receive either propranolol or a placebo (a look-alike substance that contains no drug) daily for 12 weeks. After the 12 weeks, all participants will have the opportunity to receive propranolol for an additional 12 weeks.