Disruptive Mood Dysregulation Symptoms in Autism Spectrum Disorder

While autism spectrum disorder (ASD) has been studied extensively in the field of child psychology, the diagnosis of disruptive mood dysregulation disorder (DMDD), by virtue of being a newer diagnostic classification, has received less empirical attention. At face value, the two disorders may appear to have very little in common; however, there exists a degree of symptomatic crossover, associated features, and potential comorbidities that can complicate differential diagnosis. ASD being a neurodevelopmental disorder suggests a lifelong trajectory, while DMDD by definition is limited to childhood and adolescence (ages 6–18). Both conditions involve differences in brain development and function, both are typically diagnosed in early childhood, and symptoms become apparent during the early years of life, although children under the age of 6 cannot receive a diagnosis of DMDD. Both disorders can create a significant impact on a child’s social, emotional, behavioral, family, educational, and community functioning. Despite some similarities, ASD and DMDD also have distinct differences in terms of their diagnostic criteria and symptom presentation. ASD is characterized by difficulties with communication and social interaction, as well as restricted and repetitive behaviors and interests, while core symptoms of DMDD involve chronic irritability and extreme temper outbursts. To offer the most effective support and interventions for individuals with ASD or DMDD, it is crucial for clinicians and researchers to gain a deeper understanding of these disorders in order to improve outcomes and enhance quality of life for those affected. Key variables and details in assisting clinicians to assess, differentiate, and treat ASD and DMDD will be explained in the ensuing chapter.