Individuals who are dually diagnosed with Down Syndrome (DS) and autism spectrum disorders (ASD) frequently engage in vocal stereotypy that can interfere with learning, impede socially appropriate behavior, and disrupt others. Response interruption and redirection (RIRD) is an intervention that blocks and redirects stereotypy to reduce behavior.…

This study examined the relationship between executive function and externalizing behaviors within a student population that was assessed for special education services. Executive function was measured by using the Comprehensive Executive Function Inventory (CEFI). Externalizing behaviors and school problems was measured using the Behavior…

Substance use disorders are considered externalizing disorders, defined by anti-social and impulsive behavior, as opposed to internalizing disorders, defined by anxious and depressive thinking; however, that strict binary is increasingly untenable. In this dissertation, I evaluate the co-development of internalizing and externalizing symptoms…

This study examined the relations between child internalizing behavior problems and social competence in a sample of young children (N = 166) with autism spectrum disorders (ASD) as they transitioned to early schooling. Previous literature suggested higher rates of comorbid psychopathology in this population of children; however, a limited number…

Adolescent risk-taking can potentially result in serious individual and societal consequences. Previous research demonstrates that emotional and behavioral problems, particularly externalizing behaviors, are significantly associated with an array of risky behaviors such as substance use, sexual behavior, injury, and violence. However, the…

Alternative education students face many interacting challenges that put them at significant risk of dropping out of school (Carver & Lewis, 2010), as well as deleterious health and psychological outcomes, and intergenerational cycles of sociopolitical disadvantage (Laird, Kienzel, Debell & Chapman, 2007). Despite the persistent national…

I conducted two studies. First, I examined the applicability of discrete-trial functional analysis (DTFA) for identifying the function of problem behavior in three adults with a dual diagnosis of a significant intellectual disability and a mental illness. Results indicated clear patterns of problem behavior for each participant. Second, I used a…

The number of children diagnosed with pediatric bipolar disorder has increased 4,000% from 1994 to 2003. Researchers have identified the need for teachers' professional development in this area but have not specified what teachers need to know to effectively educate students. The problem addressed was this lack of clinical knowledge and…