Investment Model Scale

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

CommitmentSatisfactionInvestmentQuality of Alternatives

Perceived Relationship Quality Components (PRQC) Scale

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, 340–355. https://doi.org/10.1177/0146167200265007

CommitmentTrustSatisfactionRelationship QualityPassionIntimacyLove