18698. HARRY STACK SULLIVAN’S THEORY OF PERSONALITY. This paper provides an overview and analysis of the personality theory of Harry Stack Sullivan, which emphasizes the role of interpersonal interactions in personality development. The paper includes a discussion of the major constructs of the theory, as well as a discussion of the evidence from empirical studies that have provided support for the theory. KEYWORDS: psychology personality theory research Sullivan interpersonal psychiatry child development friendships peer interactions. APA Style. 12 pages, 22 footnotes, 8 bibliographic sources. 2,884 words.