RSTI Theory

Professor David Olson's Circumplex Model from the University of Minnesota is one of the most influential theoretical frameworks in family therapy, cited in over 1,200 studies worldwide. The model categorizes family cohesion into four levels: disengaged, separated, connected, and enmeshed. RSTI simplifies this into two poles: High-cohesion types (Merged) pursue deep emotional fusion, shared decision-making, and intensive interaction; Low-cohesion types (Independent) value personal autonomy and maintain clear psychological boundaries within intimacy. Research indicates that cohesion compatibility predicts relationship satisfaction better than absolute levels.

Professor John Gottman at the University of Washington conducted 40 years of longitudinal research on 3,000 couples through his "Love Lab," developing observational indicators that predict divorce with 94% accuracy. He found that conflict itself isn't problematic—how it's handled is key. Gottman identified three stable conflict styles: volatile, validating, and avoiding. RSTI simplifies these into two core patterns: Expressive types (Volatile) tend to externalize emotions immediately and engage in active discussion; Regulated types (Calm) prefer analytical approaches and de-escalation. Both styles can maintain healthy relationships when partners understand and respect each other's patterns.

Canadian sociologist John Alan Lee developed the Color Wheel Theory of Love through literature analysis and in-depth interviews, categorizing love into six basic types: Eros (passionate love), Ludus (playful love), Storge (friendship love), Pragma (practical love), Mania (obsessive love), and Agape (selfless love). RSTI integrates these into two driving forces: Emotional types use emotional intensity, romantic experience, and spiritual connection as the core fuel for relationships; Pragmatic types prioritize lifestyle compatibility, value alignment, and long-term stability. This dimension reflects fundamental definitions of an "ideal relationship."

Professor Arthur Aron's Self-Expansion Theory at SUNY Stony Brook proposes that humans have an intrinsic motivation to expand their self-concept, capabilities, and resources through intimate relationships. Research shows that early relationship passion largely stems from rapid self-expansion experiences. RSTI distinguishes two developmental orientations: Static types value the secure foundation and predictability of relationships, seeking to deepen existing connections rather than constant change; Growth types expect to explore new territories with partners, embrace challenges, and maintain relationship vitality through continuous novel experiences. These orientations reflect different expectations for relationship "evolution."