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