A 41-year-old man presents to the PMHNP with a diagnosis of schizoid personality disorder. According to Erikson, failure to resolve which psychosocial developmental stage is associated with this personality disorder?

Choice A reason: Industry vs. Inferiority occurs in school-aged children and relates to competence, not isolation or emotional detachment. Choice B reason: Initiative vs. Guilt occurs in early childhood and primarily influences purposeful action and initiative rather than adult interpersonal relationships. Choice C reason: Identity vs. Role Confusion occurs in adolescence and relates to self-concept; failure here is associated with identity issues but not specifically with emotional detachment. Choice D reason: Intimacy vs. Isolation occurs in young adulthood; failure to achieve intimacy can result in social withdrawal, emotional detachment, and difficulty forming close relationships, which is characteristic of schizoid personality disorder.