The document discusses the four main functions of behavior: attention, access, avoidance/escape, and automatic reinforcement. Maladaptive behaviors in individuals with cognitive impairments are often attempts to compensate for deficits. A functional behavior assessment involves defining the problem behavior, collecting data on antecedents and consequences, and determining the behavior's function. This allows interventions to be developed that undermine the problem behavior's reinforcement while promoting new functional behaviors across environments, with ongoing monitoring and adjustment.