RelaScale

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.

Relationship Assessment Scale

Hendrick, S. S. (1988). A generic measure of relationship satisfaction. Journal of Marriage and Family, 50(Feb 88), 93–98.

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, 340355.

Quality of Marriage Index

Norton, R. (1983). Measuring Marital Quality: A Critical Look at the Dependent Variable. Journal of Marriage and Family, 45(1), 141–151. https://doi.org/10.2307/351302

Dyadic Adjustment Scale

Spanier, G. B. (1976). Measuring Dyadic Adjustment: New Scales for Assessing the Quality of Marriage and Similar Dyads. Journal of Marriage and Family, 38(1), 15–28. https://doi.org/10. 2307/350547

The Couples Satisfaction Index (CSI)

Funk, J. L. & Rogge, R. D. (2007). Testing the ruler with item response theory: Increasing precision of measurement for relationship satisfaction with the Couples Satisfaction Index. Journal of Family Psychology, 21, 572-583.