The interpersonal circumplex is a circular map of human social behavior organized around two core dimensions: how warm or cold you are toward others, and how dominant or submissive you tend to be. Developed in the 1950s from the clinical psychology work of Harry Stack Sullivan and Timothy Leary, it remains one of the most widely used frameworks in personality research for describing how people relate to each other. What makes it distinctive is its geometry: rather than sorting people into types or listing traits on a checklist, it places every interpersonal style on a continuous circle, so that neighboring styles share features and opposite styles are genuine opposites.
The Two Dimensions That Anchor the Circle
Everything on the interpersonal circumplex traces back to two axes. The horizontal axis runs from cold and hostile on one end to warm and friendly on the other. Researchers call this dimension communion or affiliation. The vertical axis runs from submissive at the bottom to dominant at the top, a dimension called agency. These two lines cross at the center of the circle, and every point on the rim represents a blend of the two. Someone who scores high on both warmth and dominance falls in the upper-right region, a style you might call “friendly-leading.” Someone high on dominance but low on warmth lands in the upper-left, a style closer to “bossy” or “controlling.”
The circle is typically divided into eight slices, or octants, each labeled with a pair of adjectives. Moving clockwise from the top, you pass through dominant, dominant-hostile, hostile, hostile-submissive, submissive, submissive-friendly, friendly, and friendly-dominant. These labels vary somewhat across instruments and research groups, but the underlying geometry stays the same. The key insight is that traits positioned close together on the circle tend to co-occur in real people, while traits directly across the circle from each other are inversely related. If someone is genuinely warm, they tend not to be cold; if they are dominant, they tend not to be submissive. This sounds obvious until you consider how many personality models treat each trait as independent.
The warmth and dominance dimensions show up not only as stable personality traits but also as moment-to-moment shifts in behavior. In a therapy session, for example, a client might start the hour in a submissive-friendly posture and shift toward hostile-dominant after a frustrating exchange. Researchers have argued that these dimensions can be understood both as trait-like dispositions and as dynamic states that fluctuate in real time, which is part of what makes the model useful in clinical work.1PubMed Central. Using Interpersonal Dimensions of Personality and Personality Pathology to Examine Momentary and Idiographic Patterns of Alliance Rupture
Where the Model Came From
The interpersonal circumplex traces its intellectual lineage to the psychiatrist Harry Stack Sullivan, who argued in the mid-twentieth century that personality is fundamentally about recurring patterns of interaction rather than internal structures hidden inside the mind. In the 1950s, the Kaiser Foundation Psychology Research Group in California took Sullivan’s ideas and tried to measure them. Timothy Leary, then a psychologist at Kaiser (before his later notoriety), published a 1957 framework that became the conceptual foundation for modern circumplex models.2PubMed. An informal history of the interpersonal circumplex tradition Leary’s original circle was rough, but it established the core idea that two orthogonal dimensions could organize a wide variety of interpersonal behaviors into a coherent structure.
Through the 1970s and 1980s, researchers like Jerry Wiggins refined the model, developed better questionnaires, and demonstrated that the circular structure wasn’t just a convenient diagram but actually held up in data. When you plot how people describe their own interpersonal behavior using carefully designed adjective lists, the pattern that emerges is genuinely circular rather than clustered or lumpy. That empirical confirmation gave the circumplex a degree of structural rigor that many personality models lack.
Instruments for Measuring Interpersonal Style
Several questionnaires have been built around the circumplex, each designed to capture a slightly different slice of interpersonal life. The most commonly used fall into three families.
The Interpersonal Adjective Scales, originally developed by Wiggins, ask people to rate themselves on a set of trait adjectives. Research examining whether the IAS actually fits the circular structure it claims to represent has found that the fit is excellent across different testing methods and perspectives.3Personality and Social Psychology Bulletin. Interpersonal Adjective Scales: Confirmation of Circumplex Structure from Multiple Perspectives In other words, the math backs up the geometry. When you analyze how people respond to these adjectives, the pattern really does form a circle, not a blob or a triangle.
The Inventory of Interpersonal Problems (IIP) takes a different approach. Instead of asking what you are like, it asks what you find difficult in relationships. Items cover things like being too trusting, having trouble saying no, or being overly competitive. A shorter version, the IIP-SC, is widely used in clinical settings. A newer instrument, the Circumplex Scales of Interpersonal Problems, was designed to improve on the IIP’s psychometric properties and has been validated against both the IIP and the Interpersonal Adjective Scales, showing expected patterns of convergence.4PubMed Central. Development and validation of the Circumplex Scales of Interpersonal Problems
A third family of measures focuses on interpersonal values rather than traits or problems. The Circumplex Scales of Interpersonal Values asks what you consider important in relationships, such as valuing being in charge versus valuing being cared for. This fills a gap left by behavior-focused instruments, because two people can act the same way for very different reasons.5PubMed. Circumplex scales of interpersonal values: reliability, validity, and applicability to interpersonal problems and personality disorders
How the Circumplex Maps onto the Big Five
If you already know the Big Five personality traits (extraversion, agreeableness, conscientiousness, neuroticism, and openness), a natural question is how the circumplex relates. The short answer: the circumplex’s two dimensions correspond closely to specific facets of extraversion and agreeableness, but the relationship is more precise than a simple one-to-one match.
Research breaking the Big Five down into narrower sub-traits, or “aspects,” has found that the assertiveness aspect of extraversion aligns with the circumplex’s dominance axis, while the compassion aspect of agreeableness aligns with the warmth axis.6Personality and Individual Differences. Mapping the interpersonal domain: Translating between the Big Five, HEXACO, and Interpersonal Circumplex This means the circumplex is not an alternative to the Big Five but rather a more detailed map of the interpersonal region that the Big Five covers with just two of its five broad factors. A study examining the aspects of extraversion (assertiveness and enthusiasm) and agreeableness (compassion and politeness) found that these four aspects together mirror the octant structure of the circumplex, so the two models are describing the same territory at different levels of resolution.7PubMed. Unifying the aspects of the Big Five, the interpersonal circumplex, and trait affiliation
Researchers have also used a statistical technique called the structural summary method to ask whether other personality constructs are “interpersonal” in nature. Essentially, you take some external measure and see whether scores on it form a smooth curve when plotted against the eight octants of the circumplex. If they do, the construct has a clear interpersonal signature. If they don’t, it sits outside the interpersonal domain. Studies using this approach have found that all Big Five traits contain at least some agentic and communal qualities as measured by the circumplex.8PubMed. Interpersonal Perceptions of the Five-Factor Model of Personality: An Examination Using the Structural Summary Method for Circumplex Data Newer statistical refinements to the structural summary method have introduced confidence intervals, which let researchers make sharper comparisons between groups or constructs rather than relying on eyeballing the curves.9PubMed. Beyond Description in Interpersonal Construct Validation: Methodological Advances in the Circumplex Structural Summary Approach
Clinical Uses and Personality Disorders
One of the circumplex’s most productive applications is in clinical psychology, where it helps clinicians understand and communicate what is going wrong in a patient’s relationships. Personality disorders, in particular, tend to produce rigid, extreme interpersonal patterns, and those patterns can be located on the circumplex.
Work validating the IIP’s circumplex structure in clinical samples has shown that observer-rated personality disorder criteria line up with self-reported interpersonal problems in the ways the model predicts. For instance, someone meeting criteria for a personality disorder characterized by social withdrawal tends to score in the cold-submissive region, while someone with criteria for a more aggressive disorder tends to score in the dominant-hostile region.10PubMed. Circumplex structure and personality disorder correlates of the Interpersonal Problems model (IIP-C): construct validity and clinical implications The practical value is that clinicians can use these interpersonal profiles to anticipate what will happen in therapy, particularly around the working relationship between therapist and client.
Cross-cultural research has tested whether these personality disorder profiles look the same when assessed in different languages. A study of Mandarin-English bilingual speakers found that DSM-5 personality disorder scales produced highly similar interpersonal profiles whether the questionnaires were completed in English or Chinese, suggesting that the interpersonal signatures of these disorders are not artifacts of Western-language measurement.11PubMed. Comparing English-Language and Chinese-Language Assessment of DSM-5 Personality Disorders and Interpersonal Problems in Chinese Bilingual Speakers
Complementarity in Therapy
A core prediction from interpersonal theory is the principle of complementarity: people pull for responses that match their own behavior along certain rules. On the warmth axis, warmth invites warmth and hostility invites hostility (correspondence). On the dominance axis, dominance invites submission and vice versa (reciprocity). When these pulls are satisfied, interactions tend to feel smooth; when they are violated, tension or disruption results.
In psychotherapy, complementarity has real consequences for how treatment goes. A study of cognitive-behavioral therapy for depression found that when both client and therapist were behaving in warm, affiliative ways, the therapeutic alliance was stronger. The dominance axis was more nuanced. Clients who came in with overly dominant interpersonal styles actually did better when the therapist did not simply submit, breaking the expected complementarity pattern. Meanwhile, clients who were already submissive benefited more when the therapist matched the predicted complementary dynamic.12PubMed. Effects of patient-therapist interpersonal complementarity on alliance and outcome in cognitive-behavioral therapies for depression: Moving toward interpersonal responsiveness The takeaway for therapists is that rigid adherence to complementarity is not always the goal. Sometimes the therapeutic work involves deliberately stepping outside the expected pattern to help the client experience something new.
Attachment Styles Through the Circumplex Lens
Attachment theory and interpersonal circumplex theory developed separately, but researchers have found substantial overlap in what they describe. The four adult attachment styles (secure, preoccupied, dismissive, and fearful) can be mapped onto interpersonal dimensions. Secure attachment, characterized by low anxiety and low avoidance in close relationships, relates most strongly to warm and moderately assertive interpersonal functioning. The dimension running from secure to fearful attachment shares the most variance with circumplex constructs overall.13PubMed. An interpersonal analysis of adult attachment style: circumplex descriptions, recoiled developmental experiences, self-representations, and interpersonal functioning in adulthood
Clinical data reinforce this connection. In a study of people seeking treatment, secure attachment was negatively related to problems with domineeringness, vindictiveness, coldness, social inhibition, and nonassertiveness.14PubMed. Attachment and interpersonal distress: examining the relationship between attachment styles and interpersonal problems in a clinical population In plain terms, the more securely attached someone was, the fewer extreme interpersonal problems they reported across virtually the entire circle. Insecure attachment, by contrast, tended to push people toward the outer edges of the circumplex, where interpersonal behavior becomes more rigid and extreme.
The Dark Triad on the Circle
The so-called Dark Triad of personality, consisting of narcissism, Machiavellianism, and psychopathy, is often treated as a single cluster of unpleasant traits. The circumplex reveals that these three are actually quite different in interpersonal terms. One study found that narcissism falls in the friendly-dominant quadrant, Machiavellianism in the hostile-submissive region, and psychopathy in the hostile-dominant region.15Personality and Individual Differences. Positioning the Dark Triad in the interpersonal circumplex: The friendly-dominant narcissist, hostile-submissive Machiavellian, and hostile-dominant psychopath? This helps explain why narcissists can be charming (they are high on warmth, at least on the surface) while psychopaths are more straightforwardly aggressive, and Machiavellians are more covert and strategic.
A multicultural follow-up study with self-report data from undergraduate students largely confirmed these positions, though with one difference: Machiavellianism was placed in the dominant-hostile quadrant alongside psychopathy rather than in the hostile-submissive space. The study’s authors noted that narcissism remained consistently in the dominant-friendly quadrant, supporting the idea that all three traits have genuinely distinct interpersonal profiles even if the exact placement of Machiavellianism varies somewhat across samples.16International Journal of Personality Psychology. Locating the Dark Triad traits within the Interpersonal Circumplex: A multicultural perspective The disagreement about Machiavellianism’s placement is itself informative: it suggests that Machiavellian behavior may look more submissive-hostile or dominant-hostile depending on the social context and measurement method, which fits the common intuition that manipulative people shift their style more than most.
Does the Model Work Across Cultures?
Any personality model risks being parochial, describing the social habits of American or Western European college students and not much else. Researchers have tested the circumplex’s structure in other cultural contexts with generally encouraging results. A study adapting Wiggins’ Interpersonal Adjective Scales into Spanish found that the internal circular structure replicated well, with the original instrument’s geometry largely intact in the translated version.17European Journal of Psychological Assessment. The Structure of Wiggins’ Interpersonal Circumplex: Cross-Cultural Studies The bilingual personality disorder study mentioned earlier adds another data point, showing that the interpersonal profiles of DSM-5 personality disorders look similar when assessed in English and Mandarin Chinese.
This cross-cultural stability makes theoretical sense. Warmth and dominance are not uniquely Western concerns. Virtually every human society organizes social life around questions of who is in charge and who can be trusted, and these two questions map directly onto the circumplex’s two axes. The specific behaviors that signal warmth or dominance vary across cultures, of course, but the underlying dimensions appear to be robust.
Biological Threads
Most circumplex research focuses on behavior and self-report, but some studies have looked for biological correlates. One study examining oxytocin, a hormone linked to social bonding, found a complex pattern in women with depression. Higher oxytocin concentrations during an imagery task were associated with greater difficulty being sociable and with self-described problems of domineeringness, social avoidance, and nonassertiveness.18PubMed Central. Evidence of Dysregulated Peripheral Oxytocin Release Among Depressed Women That finding cuts against the popular image of oxytocin as a straightforward “cuddle hormone.” In the context of depression, its release seems linked to a scattered pattern of interpersonal difficulties spread across multiple octants of the circumplex, rather than a simple deficit of warmth.
Research on nonverbal behavior also connects to the circumplex’s dimensions. Humans rely on facial expressions, posture, voice, and head movements to communicate relational messages along continua that include dominance-submission and trust-distrust, dimensions that map naturally onto the circumplex’s vertical and horizontal axes.19PubMed Central. Nonverbal Behaviors “Speak” Relational Messages of Dominance, Trust, and Composure This suggests the circumplex captures something that operates below the level of conscious self-report, in the body language people produce and read automatically.
The Circumplex Meets Artificial Intelligence
A newer frontier for the interpersonal circumplex involves its application to human-computer interaction and AI design. Researchers have proposed using the circumplex’s warmth and dominance dimensions as a coordinate system for designing the social personas of AI negotiation agents, arguing that the model provides a rigorous framework for testing how an agent’s interpersonal style affects negotiation outcomes.20Current Opinion in Psychology. Personality Engineering with AI Agents: A New Methodology for Negotiation Research Rather than vaguely instructing an AI to be “assertive” or “friendly,” a designer could specify a precise location on the circumplex and adjust both dimensions independently.
Research on AI companions has drawn on the same theory to understand how users respond to virtual characters. The idea is that an AI companion’s responses can be classified as affiliation-oriented or dominance-oriented, and those orientations shape the user’s experience in predictable ways, including the element of surprise when the AI departs from its expected interpersonal position.21AISeL. When Virtual Characters Surprise: Exploring Conversational Experience with AI Companions As conversational AI becomes more widespread, the circumplex may offer a shared vocabulary for describing what it means for a chatbot or virtual assistant to have a “personality” in the interpersonal sense, moving beyond vague labels like “helpful” or “sarcastic” toward a two-dimensional space that has decades of empirical scaffolding behind it.