What condition is characterized by a deeply ingrained, non-psychotic, rigid behavior pattern?

The condition characterized by a deeply ingrained, non-psychotic, rigid behavior pattern is a personality disorder. Personality disorders are defined by enduring patterns of behavior, cognition, and inner experience that deviate markedly from the expectations of the individual's culture. These patterns are inflexible and pervasive across a range of personal and social situations, often leading to significant distress or impairment in functioning.

In contrast, obsessive-compulsive disorder involves intrusive thoughts and compulsive behaviors but does not necessarily reflect the rigid behavior patterns seen in personality disorders. Anxiety disorders are characterized by excessive fear or anxiety and can lead to avoidance behaviors but do not focus on the consistent behavioral patterns characteristic of personality disorders. Psychotic disorders typically involve a loss of contact with reality, including symptoms like hallucinations or delusions, which is not aligned with the rigid and deeply ingrained nature of personality disorders. Thus, personality disorder is the most accurate descriptor of the condition presented in the question.