Which group of disorders is characterized by impairments in social interaction and communication, along with unusual behaviors?

The group of disorders characterized by impairments in social interaction and communication, along with unusual behaviors, is known as Autism spectrum disorders (commonly referred to as ASD). Autism spectrum disorders include a range of neurodevelopmental conditions that affect how individuals communicate, interact with others, and engage in repetitive or restricted patterns of behavior.

These disorders can vary in severity and presentation, but key features typically include difficulties in understanding social cues, challenges with verbal and non-verbal communication, and a tendency to engage in specific routines or interests. ASD is recognized distinctly because it encompasses a broad spectrum of symptoms and manifestations, aligning well with the description provided in the question.

Pervasive developmental disorders are often considered a broader category that includes autism but does not specifically define it. ADHD primarily involves attention and hyperactivity issues, while learning disabilities are focused on specific learning challenges unrelated to social and communication skills. Thus, Autism spectrum disorders is the most precise answer for the characteristics described.