Commitment to Relationship

Abstract

The Commitment to Relationship (CTR) measure—most prominently operationalized within the Perceived Relationship Quality Components (PRQC) inventory developed by Garth J. O. Fletcher, Jeffry A. Simpson, and Geoff Thomas (2000)—is an empirically rigorous psychometric instrument designed to assess an individual’s subjective intent, psychological attachment, and long-term dedication to maintaining an ongoing romantic partnership. Rooted in social exchange theory and interdependence theory, the instrument isolates relationship commitment from conceptually adjacent constructs such as global satisfaction, trust, intimacy, passion, and love. Administered typically via a 7-point Likert-type response format ranging from 1 (Not at all) to 7 (Extremely), the scale evaluates core indicators of interpersonal dedication, including self-reported commitment, devotion, and psychological investment in the temporal endurance of the bond. Psychometric investigations reveal exceptional internal consistency (with Cronbach’s alpha coefficients routinely exceeding .88 to .95), strong test-retest reliability across longitudinal assessments, and robust structural validity verified through second-order confirmatory factor analysis (CFA). This profile positions the scale as a benchmark assessment tool in empirical social psychology, marital therapy, and dyadic longitudinal research.

Keywords

Commitment to Relationship, Perceived Relationship Quality Components, PRQC, Interdependence Theory, Dyadic Dedication, Romantic Relationship Longevity, Relationship Stability, Psychometric Evaluation, Confirmatory Factor Analysis, Investment Model

Authors

The theoretical and empirical architecture of the Commitment to Relationship component of the PRQC inventory was formulated by:

• Garth J. O. Fletcher, Ph.D. — Professor of Psychology, School of Psychology, Victoria University of Wellington, New Zealand (formerly at the University of Canterbury).
• Jeffry A. Simpson, Ph.D. — Professor of Psychology and Director of the Doctoral Program in Social Psychology, Department of Psychology, University of Minnesota, Twin Cities, United States.
• Geoff Thomas, Ph.D. — Researcher and Statistician, Department of Psychology, University of Canterbury, Christchurch, New Zealand.

Purpose

The primary purpose of the Commitment to Relationship (CTR) scale is to quantitatively measure an individual’s conscious orientation toward the long-term continuation of their romantic bond. While historical approaches in marital and relationship research frequently conflated distinct evaluative dimensions into broad, undifferentiated metrics (such as marital adjustment or global satisfaction), modern relationship science requires precise, domain-specific instruments. The CTR subscale was developed to disaggregate the distinct cognitive and motivational properties of commitment from hedonic evaluations like partner satisfaction, affectionate feelings, or physical passion.

In research contexts, the scale is deployed to explain behavioral mechanisms such as accommodation, sacrifice, constructive conflict resolution, and the derogation of attractive alternatives. Interdependence theorists have consistently demonstrated that satisfaction alone is insufficient to predict relationship persistence during periods of distress; commitment serves as the definitive structural bridge that anchors individuals through relational hardship. In clinical and counseling environments, couples therapists utilize the CTR to assess therapeutic readiness, balance asymmetries in partners’ relational investment (e.g., in mixed-agenda couples), and track shifts in dedication over the trajectory of systemic or behavioral couples therapy.

Psychological Construct

Commitment in close relationships represents an internal psychological state comprising three interconnected dimensions: an intent to persist, a long-term temporal horizon, and psychological attachment to the dyad. Within the PRQC framework established by Fletcher et al. (2000), commitment is defined as the degree to which an individual expresses the explicit desire and intention to indefinitely sustain a partnership with a particular person.

The construct encompasses several distinct facets:

• Cognitive Intent to Persist: The deliberate decision to remain within the relationship regardless of short-term fluctuations in affective gratification or immediate rewards.
• Long-Term Temporal Orientation: The cognitive framing of the future as an interconnected unit (“we” and “us” rather than “I” and “me”), projecting plans, life goals, and resource allocations decades forward.
• Devotion and Dedication: The emotional willingness to prioritize the health and continuation of the partnership over competing individualistic desires or external alternatives.

Crucially, the construct evaluated by the CTR emphasizes personal dedication—the internal desire to maintain the relationship—as opposed to structural or moral constraints (e.g., financial entanglements, social pressure, or legal obligations that enforce endurance against personal desire).

Theoretical Framework

The CTR scale is fundamentally anchored in Interdependence Theory (Kelley & Thibaut, 1978) and Caryl Rusbult’s Investment Model of Commitment Processes (Rusbult, 1980, 1983). According to this tradition, commitment is a central psychological clearinghouse that integrates three antecedents: satisfaction level (rewards minus costs relative to expectations), quality of alternatives (the perceived desirability of options outside the dyad), and investment size (resources bound up in the relationship that would be lost if it dissolved).

Fletcher, Simpson, and Thomas (2000) synthesized this model with social cognitive theories of cognitive schema and lay relationship theories. Under their Ideal Standards Model, individuals evaluate their real-world partnerships against chronically accessible internal standards. Within this cognitive architecture, relationship quality is inherently multidimensional. Commitment functions as an executive regulatory component: when partners perceive their relationship as aligned with their core ideals, commitment solidifies, transforming transient subjective evaluations into enduring motivational dedication.

Validity

Extensive psychometric testing supports the construct, convergent, discriminant, and predictive validity of the scale:

• Construct Validity: Verified through multi-sample structural equation modeling across dating, cohabiting, and married cohorts. The commitment items load cleanly on their designated first-order factor without significant cross-loadings on adjacent constructs like trust or love.
• Convergent Validity: The scale correlates strongly with Rusbult’s Commitment Scale from the Investment Model Scale (r values typically between .75 and .86) and Sternberg’s Decision/Commitment subscale from the Triangular Love Scale (r > .70).
• Discriminant Validity: Multitrait-multimethod analyses and CFA nested-model comparisons show that modeling commitment as an independent factor yields significantly better fit indices than collapsing commitment and satisfaction into a unidimensional quality factor (Δχ² tests consistently statistically significant at p < .001).
• Predictive Validity: Longitudinal studies demonstrate that baseline scores on the commitment scale prospectively predict relationship longevity, rate of breakups, and specific pro-relationship behaviors (such as willingness to sacrifice and forgiveness) across intervals ranging from 6 months to several years.

Reliability

The scale demonstrates exemplary reliability across independent samples and cultural adaptations:

• Internal Consistency: In the seminal Fletcher et al. (2000) study, the commitment component demonstrated internal consistency coefficients ranging from α = .88 to .95 across multiple waves and exploratory/confirmatory samples. Subsequent independent studies report Cronbach’s α and McDonald’s ω values consistently above .90.
• Test-Retest Stability: In longitudinal assessments spanning 3-month to 1-year intervals, the scale displays high temporal stability (r = .70 to .82 in stable couples), while remaining sensitive to genuine qualitative deterioration or relational transitions.
• Measurement Invariance: Full metric and scalar invariance have been confirmed across genders (men vs. women) and relationship stages (dating vs. married), confirming that differences in observed scores reflect true differences in latent commitment.

Factor Analysis

Fletcher, Simpson, and Thomas (2000) conducted extensive exploratory (EFA) and confirmatory factor analyses (CFA) to validate the scale’s structural architecture:

In the primary CFA models, the commitment indicators were evaluated alongside 5 other relationship dimensions (Satisfaction, Intimacy, Trust, Passion, and Love). The optimal structural model was a hierarchical, second-order factor model where:

• All commitment items loaded robustly onto a first-order “Commitment” latent variable (standardized factor loadings λ = .88 to .96, p < .001).
• The first-order Commitment factor loaded strongly onto a overarching second-order “Perceived Relationship Quality” (PRQ) factor (second-order λ ≈ .84 to .88).
• The model achieved superior goodness-of-fit indices: Comparative Fit Index (CFI) > .96, Tucker-Lewis Index (TLI) > .95, Root Mean Square Error of Approximation (RMSEA) < .055, and Standardized Root Mean Square Residual (SRMR) < .04.

Instrument / Measurement Tool

• Instrument Type: Self-report psychometric rating scale / Subscale inventory.
• Target Population: Adults (18+ years) currently in an ongoing romantic relationship (dating, cohabiting, or married).
• Administration Format: Paper-and-pencil, computer-assisted self-interview (CASI), or mobile online survey.
• Number of Items: 3 to 4 items (typically 3 primary items in the finalized, psychometrically optimized PRQC short-form).
• Response Scale: 7-point Likert scale (1 = Not at all, 4 = Moderately, 7 = Extremely).
• Scoring Procedure: Scores are calculated by averaging or summing responses across all items. Since all items are positively keyed, no reverse scoring is required. Higher scores reflect higher degrees of subjective relationship commitment.

Permissions & Fee and Test Year

The scale was formally published in 2000 within the Personality and Social Psychology Bulletin. As an academic psychometric measure published in a scientific journal, it is widely accessible for non-commercial academic, clinical, and scientific research without licensing fees, provided that appropriate scholarly attribution is cited. Commercial applications, corporate consulting deployments, or inclusion in proprietary software platforms require permission from the copyright holders (SAGE Publications / Society for Personality and Social Psychology).

References

• Fehr, B. (1988). Prototype analysis of the concepts of love and commitment. Journal of Personality and Social Psychology, 55(4), 557–579. https://doi.org/10.1037/0022-3514.55.4.557
• Fletcher, G. J. O., Simpson, J. A., & Thomas, G. (2000). The measurement of perceived relationship quality components: A confirmatory factor analytic approach. Personality and Social Psychology Bulletin, 26(3), 340–354. https://doi.org/10.1177/0146167200265007
• Fletcher, G. J. O., Simpson, J. A., Thomas, G., & Giles, L. (1999). Ideals in intimate relationships. Journal of Personality and Social Psychology, 76(1), 72–89. https://doi.org/10.1037/0022-3514.76.1.72
• Kelley, H. H., & Thibaut, J. W. (1978). Interpersonal relations: A theory of interdependence. John Wiley & Sons.
• Rusbult, C. E. (1980). Commitment and satisfaction in romantic associations: A test of the investment model. Journal of Experimental Social Psychology, 16(2), 172–186. https://doi.org/10.1016/0022-1031(80)90007-4
• Rusbult, C. E., Martz, J. M., & Agnew, C. R. (1998). The Investment Model Scale: Measuring commitment level, satisfaction level, quality of alternatives, and investment size. Personal Relationships, 5(4), 357–387. https://doi.org/10.1111/j.1475-6811.1998.tb00177.x
• Sternberg, R. J. (1986). A triangular theory of love. Psychological Review, 93(2), 119–135. https://doi.org/10.1037/0033-295X.93.2.119

Items of the Scale