A therapist sits down with Mateo's parents to explain the likely reason that Mateo developed social anxiety disorder (fear of social situations and being judged by others). The therapist notes that Mateo reacts impulsively around other kids, hitting them if he disagrees with them, calling them names, or becoming clingy to kids he barely knows. This has led to kids making fun of him, responding aggressively to him, and social isolation at school. The therapist also notes the family has a history of anxiety disorders going back at least to Mateo's grandparents. This explanation best fits which model of the etiology of mental disorders?