1. Relationship Distance: Cohesion Dimension
David Olson's Circumplex Model (1979)
Theoretical Background
Theoretical Origins & Development: The Cohesion dimension derives from Professor David Olson's Circumplex Model, developed at the University of Minnesota in 1979. Originally designed for family therapy assessment, the model was refined through subsequent revisions, leading to the FACES (Family Adaptability and Cohesion Evaluation Scales) series, now in its fourth version (FACES-IV). Translated into over 25 languages, it has been applied in clinical and research settings globally and cited in more than 1,200 studies.
Core Concepts: Olson defined cohesion as "the degree of emotional bonding among family members," proposing four levels: Disengaged, Separated, Connected, and Enmeshed. Research indicates that families in the middle range (Separated and Connected) typically function better, while extreme disengagement or enmeshment may lead to dysfunction. However, Olson emphasized cultural variation—higher cohesion levels may be normative and healthy in collectivist cultures.
Application to Intimate Relationships: RSTI simplifies Olson's four-level model into a bipolar spectrum, focusing on boundary preferences and emotional attachment patterns between partners. This is not a pathological assessment but rather helps individuals understand their natural tendencies regarding relationship distance and how these affect partner interactions.
Merged (M)
Merged / High Cohesion
Merged individuals tend to build highly integrated relationship patterns. Emotionally, they seek deep psychological intimacy and emotional synchronization; behaviorally, they prefer joint decision-making, shared social circles, and synchronized routines. Merged types view "we" as the core unit of the relationship, deriving security and belonging from togetherness. Within the attachment theory framework, merged tendencies may partially overlap with anxious attachment, but merging itself is not pathological—in relationships where both partners are merged types and mutually satisfied, high-cohesion relationships can be highly stable.
Independent (I)
Independent / Low Cohesion
Independent individuals value personal boundaries and autonomous space within relationships. Emotionally, they can regulate emotions independently without over-relying on partners as the sole source of emotional support; behaviorally, they tend to maintain individual social networks, hobbies, and alone time. Independent types view healthy relationships as "the union of two complete individuals," deriving security from maintaining selfhood. This differs from avoidant attachment—independent types don't avoid intimacy but maintain clear self-boundaries within it.
Key Insights
- 1
Compatibility Research: Olson's research indicates that cohesion compatibility predicts relationship satisfaction better than absolute levels. Pairings of two merged types or two independent types tend to be more stable than mixed combinations.
- 2
Common Conflict Patterns: When merged types experience distance anxiety, they may exhibit pursuit behaviors (more frequent contact, demanding more together time); independent types may withdraw when feeling their space is invaded. This creates a negative "pursue-withdraw" cycle.
- 3
Plasticity & Stability: Research shows cohesion preferences have moderate stability, influenced by life events (such as childbirth, trauma) and relationship quality, but core tendencies typically remain relatively stable in adulthood.