Quality of the Romantic Alternatives

1. Abstract

The Quality of the Romantic Alternatives scale is a psychometric instrument designed to evaluate an individual's subjective assessment of the desirability, feasibility, and accessibility of relational and non-relational states outside their ongoing romantic partnership. Rooted in Interdependence Theory and formalised within Caryl Rusbult’s Investment Model of Commitment Processes, the construct gauges the comparative standard against which an extant union is evaluated—traditionally termed the comparison level for alternatives ($CL_{alt}$). While early implementations formed part of broader relationship inventories, this specific 5-item operationalization evaluates both alternative dating partners and the perceived utility of independent, unpartnered living (e.g., spending time with friends or cultivating personal autonomy). Responses are recorded on a standardized 7-point Likert scale spanning from 1 (Strongly disagree) to 7 (Strongly agree), with all items averaged to yield a single composite score where higher values reflect superior perceived options outside the current relationship.

Extensive psychometric investigations have established the robust reliability and construct validity of the measure across diverse relationship stages, including casual dating, long-term cohabitation, and marriage. Across independent cohorts and contemporary empirical studies—such as recent investigations examining interpersonal antecedents of financial deception and infidelity—the instrument consistently exhibits high internal consistency (Cronbach’s $\alpha$ generally ranging between .82 and .88; McDonald’s $\omega > .84$). Confirmatory factor analyses support a strictly unidimensional structure characterized by salient factor loadings (.65 to .88) and excellent goodness-of-fit indices. The instrument demonstrates strong negative predictive validity regarding romantic commitment, partner accommodation, and relationship persistence, while positively predicting relationship termination, physical infidelity, and covert transactional behaviors such as financial infidelity. As a brief, highly reliable instrument, it serves as an indispensable tool for marital therapists, social psychologists, and behavioral researchers studying relationship dynamics, dyadic stability, and individual decision-making.

2. Keywords

Quality of alternatives, Investment Model, romantic commitment, Interdependence Theory, relationship dissolution, financial infidelity, dyadic processes, Rusbult Investment Model, comparison level for alternatives, relational satisfaction.

3. Authors

The theoretical conceptualization and psychometric foundation of the quality of alternatives construct were originally developed by the late Dr. Caryl E. Rusbult (1948–2010), Professor of Psychology at the University of North Carolina at Chapel Hill and later Chair of the Department of Social and Organizational Psychology at Vrije Universiteit Amsterdam. Dr. Rusbult was a preeminent social psychologist who pioneered the empirical study of close relationships, interdependence, and relational maintenance.

The specific 5-item operationalization featured herein was standardized in psychometric validation work on the Investment Model Scale (Rusbult, Martz, & Agnew, 1998) and subsequently adapted for modern consumer and behavioral research by Emily N. Garbinsky (Associate Professor of Marketing, Cornell University, SC Johnson College of Business), Joe J. Gladstone (Assistant Professor of Marketing, University College London, School of Management), Hristina Nikolova (Associate Professor of Marketing, Boston College, Carroll School of Management), and Jenny G. Olson (Assistant Professor of Marketing, Indiana University, Kelley School of Business) in their empirical investigation into the psychological underpinnings of interpersonal financial infidelity (Garbinsky et al., 2020).

4. Purpose

The primary purpose of the Quality of the Romantic Alternatives scale is to quantify an individual’s subjective evaluation of how favorably their needs could be met outside of their current romantic relationship. Human relationship stability does not depend solely on subjective happiness or relationship satisfaction. Rather, as decades of empirical social psychology demonstrate, individuals frequently remain in dissatisfying unions if they perceive a dearth of viable alternatives, or conversely, abandon highly rewarding relationships if exceptionally attractive alternatives present themselves. Measuring the perceived quality of alternatives provides researchers and clinicians with a direct index of structural dependence within a partnership.

In basic social psychological research, this measurement tool illuminates the psychological mechanisms governing dyadic commitment, psychological attachment, and relationship maintenance behaviors. When perceived alternatives are low, individuals experience dependence on their partner, which fosters cognitive transformations such as derogation of tempting alternative partners, positive illusions about the current partner, and a greater willingness to sacrifice. Conversely, elevated scores on this scale signal reduced dependence, attenuating the psychological motivation to forgive partner transgressions, accommodate negative behaviors, or invest joint cognitive and material resources.

Beyond traditional relationship science, the scale has critical applications in consumer psychology, behavioral economics, and clinical relationship counseling. In consumer research, as demonstrated by Garbinsky, Gladstone, Nikolova, and Olson (2020), perceived quality of alternatives serves as an indicator of diminished relational commitment, directly predicting covert financial behaviors, secret expenditures, and financial infidelity. When an individual perceives attractive outside romantic or lifestyle options, the dyadic alignment of goals deteriorates, leading partners to withhold financial information and manage assets independently or deceitfully.

In clinical and couples therapy contexts, the scale functions as an assessment tool to evaluate dissolution risk and emotional detachment. Identifying whether an individual perceives their alternatives—including autonomous single life—as superior to the ongoing relationship allows marital counselors to contextualize distress. It helps clarify whether interpersonal discord stems from resolvable communication deficits within an otherwise dependent bond, or whether an acute commitment crisis exists driven by the pull of outside options.

5. Psychological Construct

The psychological construct measured by this instrument is the Perceived Quality of Alternatives, defined as the perceived desirability of the best available alternative to an ongoing relationship. This construct represents an individual’s evaluation of the extent to which their most fundamental interpersonal needs—such as companionship, sexual fulfillment, emotional intimacy, validation, and economic security—could be adequately or superiorly satisfied outside the current partnership.

Importantly, the construct of alternatives does not merely encompass other prospective romantic or sexual partners. A critical conceptual feature of this 5-item scale is its dual-faceted representation of alternatives, which includes:

• Specific Interpersonal Alternatives: The perceived availability and attractiveness of other specific or generalized individuals with whom the respondent could initiate a dating, sexual, or marital relationship (captured by items 1, 3, and 5). This dimension gauges social market value and the respondent’s confidence in their ability to attract a desirable alternative mate.
• Non-Relational and Autonomous Alternatives: The perceived attractiveness of unpartnered single life, spending time independently, dedicating resources to oneself, or relying on platonic friendships and familial networks (captured by items 2 and 4). This component acknowledges that independence or solitary living can constitute an alternative that competes directly with remaining in an unsatisfying or restrictive relationship.

Psychologically, the perception of alternatives operates both as a conscious evaluation and an automatic cognitive filter. Individuals who are deeply committed to their partners typically exhibit automatic cognitive biases that actively devalue, downplay, or ignore attractive alternative partners—a phenomenon known as the derogation of alternatives. Consequently, an individual’s score on the Quality of the Romantic Alternatives scale reflects both external objective availability (e.g., social environment, workplace exposure, demographic mate pools) and internal, subjective cognitive shielding mechanisms. When cognitive shielding fails or commitment erodes, the conscious appraisal of external options rises, manifesting as elevated scores across the instrument’s items.

6. Theoretical Framework

The conceptual framework underpinning this instrument draws primarily from Interdependence Theory, originated by Harold Kelley and John Thibaut (1959; 1978), and the subsequent Investment Model of Commitment Processes formulated by Caryl Rusbult (1980, 1983).

Interdependence Theory and the Comparison Level for Alternatives ($CL_{alt}$)

Interdependence Theory posits that human interactions yield behavioral outcomes categorized in terms of rewards and costs. Thibaut and Kelley distinguished between two fundamental evaluation standards that individuals use to judge their relational outcomes:

• The Comparison Level ($CL$): The internal standard of what an individual feels they deserve or expect from a relationship, which dictates subjective satisfaction.
• The Comparison Level for Alternatives ($CL_{alt}$): The lowest level of relational outcomes an individual will accept in light of available alternatives, which dictates dependence.

According to this formulation, relationship stability is not isomorphic with happiness. An individual whose outcomes fall below their $CL$ is dissatisfied, but if those outcomes remain superior to their $CL_{alt}$ (i.e., their alternatives are even worse), the individual remains dependent on the relationship and is unlikely to leave. Conversely, if outcomes fall below $CL_{alt}$, termination becomes probable regardless of whether the current relationship is moderately satisfying.

Rusbult’s Investment Model

Caryl Rusbult expanded Interdependence Theory by developing the Investment Model, which identifies commitment as the central psychological engine predicting relationship persistence. Within this model, commitment is a function of three distinct components:

1. Satisfaction Level ($+$): The positive affective experience derived from a partner fulfilling key emotional, sexual, and practical needs.
2. Quality of Alternatives ($-$): The extent to which important needs could be fulfilled outside the current relationship. Perceived high quality of alternatives exerts a direct negative influence on commitment.
3. Investment Size ($+$): The magnitude and significance of resources put into the relationship that would be lost or declined in value if the partnership were dissolved (e.g., shared property, financial investments, children, shared social circles, mutual memories).

Commitment is mathematically represented as:

Commitment = Satisfaction Level – Quality of Alternatives + Investment Size

The Quality of the Romantic Alternatives scale isolates the second predictor of this equation. In the extended theoretical model, when quality of alternatives increases, commitment plummets, weakening the structural glue holding the couple together. As demonstrated by Garbinsky et al. (2020), this deterioration of commitment manifests not only in relational termination but in sub-lethal relational transgressions, such as financial secrecy and deceit, because the individual de-identifies with the dyad and begins preparing for individual autonomy.

7. Validity

The construct, convergent, discriminant, and predictive validity of the Quality of Alternatives scale have been extensively evaluated across decades of interpersonal research.

Construct and Factorial Validity

Confirmatory factor analytic studies repeatedly confirm that the items assessing quality of alternatives load onto a unitary latent construct that is structurally distinct from relationship satisfaction and investment size. Rusbult, Martz, and Agnew (1998) verified that a three-factor model separating satisfaction, alternatives, and investment yielded superior fit relative to nested single- or two-factor models ($\chi^2$ difference tests, $p < .001$), demonstrating that the perceived quality of options is an empirically autonomous cognitive dimension.

Convergent Validity

Convergent validity is documented via robust associations with theoretically aligned constructs. The scale demonstrates statistically significant positive correlations with:

• Attentiveness to alternative partners (measured via gaze tracking and memory recognition tasks; $r pprox .40$ to $.55$, $p < .001$).
• Sociosexual orientation (SOI; individuals with an unrestricted sociosexual orientation consistently report higher perceived quality of alternatives; $r pprox .35$ to $.48$).
• Self-perceived mate value ($r pprox .30$ to $.42$).

Discriminant Validity

Discriminant validity is verified by showing that perceived quality of alternatives does not merely represent relationship dissatisfaction. Meta-analytic findings across 52 studies ($N > 11,000$) conducted by Le and Agnew (2003) demonstrated that while quality of alternatives is negatively correlated with satisfaction ($r = -.44$), the magnitude of the shared variance ($R^2 pprox 19.4%$) leaves over 80% of the construct variance unexplained by satisfaction alone. Furthermore, the construct correlates weakly with general social desirability ($r < -.12$, non-significant in most samples), demonstrating that respondents readily report the presence of attractive alternatives when standardized confidentiality protections are observed.

Predictive and Criterion Validity

The scale possesses remarkable predictive utility for dyadic and individual outcomes:

• Relationship Dissolution: In longitudinal studies, baseline quality of alternatives robustly predicts relationship termination over 6-month, 1-year, and 3-year intervals ($eta$ ranging from $.28$ to $.44$, $p < .001$), frequently predicting breakup even after controlling for baseline satisfaction.
• Infidelity: Elevated alternatives predict both physical and emotional extramarital/extrarelational involvement across clinical and non-clinical cohorts.
• Financial Infidelity: In Garbinsky et al. (2020), the scale successfully predicted deceptive financial behavior ($b = .23, SE = .06, p < .001$). Participants scoring higher on perceived quality of alternatives were significantly more likely to conceal bank accounts, obscure debt, and purchase unapproved discretionary items without their partner's awareness.

8. Reliability

The 5-item operationalization of the Quality of the Romantic Alternatives scale possesses high internal consistency, test-retest stability, and cross-sample reliability.

Internal Consistency

Across diverse adult cohorts, the scale consistently meets standard psychometric criteria for instrument reliability ($lpha ge .80$). In Rusbult, Martz, and Agnew (1998), initial validation studies reported Cronbach’s alpha coefficients for the alternatives subscale ranging between $.82$ and $.88$. In consumer behavior applications, Garbinsky et al. (2020) demonstrated internal reliability of $lpha = .87$ in adult romantic couples.

McDonald’s hierarchical omega ($\omega_h$) and total omega ($\omega_t$), which provide less biased estimates than Cronbach’s alpha in the presence of slightly varying factor loadings, typically exceed $.85$. Item-total correlations across the five items range from $.58$ to $.78$, with no individual item deletion yielding an increase in the composite reliability coefficient.

Test-Retest Stability

Because the perception of alternatives reflects both stable personality traits (e.g., sociosexuality, extraversion) and fluctuating contextual realities (e.g., changing social environments, life transitions), test-retest reliability varies logically across measurement intervals:

• Short-term intervals (2 to 4 weeks): $r_{tt} = .81$ to $.86$, reflecting excellent temporal stability when the immediate social ecology is unchanged.
• Long-term longitudinal intervals (6 to 12 months): $r_{tt} = .52$ to $.64$. This expected decline reflects meaningful real-world alterations in social opportunities, physical relocation, or deterioration/enhancement of the ongoing primary relationship.

The Standard Error of Measurement (SEM) remains low (typically $le 0.45$ on the 7-point metric), confirming precision for individual-level clinical and diagnostic assessment.

9. Factor Analysis

Extensive exploratory (EFA) and confirmatory factor analyses (CFA) have examined the structural architecture of the 5-item Quality of the Romantic Alternatives scale.

Exploratory Factor Analysis (EFA)

When subjected to maximum likelihood or principal axis factoring with oblimin rotation alongside items measuring satisfaction and investment, the five items consistently load onto a single distinct factor with an eigenvalue exceeding Kaiser’s criterion of 1.0 (typically accounting for 54% to 68% of the total variance across items). The scree test confirms a sharp point of inflection after the first factor.

Typical standardized factor loadings from empirical samples are presented below:

• Item 1 (Other people are appealing): $lambda = .74 – .82$
• Item 2 (Alternatives are close to ideal): $lambda = .81 – .89$
• Item 3 (Would do fine / find another): $lambda = .68 – .76$
• Item 4 (Alternatives are attractive): $lambda = .83 – .90$
• Item 5 (Intimacy fulfilled elsewhere): $lambda = .65 – .74$

Confirmatory Factor Analysis (CFA)

CFA specifications modeling the five items as indicators of a solitary latent factor demonstrate robust model fit across dating, cohabiting, and married samples. Typical goodness-of-fit indices reported in empirical psychometric studies include:

• Relative Chi-Square ($\chi^2/df$): $1.42 – 2.10$ (well below the conservative threshold of 3.0).
• Comparative Fit Index (CFI): $.975 – .992$ (exceeding the standard $.95$ cutoff).
• Tucker-Lewis Index (TLI): $.962 – .986$.
• Root Mean Square Error of Approximation (RMSEA): $.038 – .058$ ($90%$ CI $[.018, .076]$, indicating close fit).
• Standardized Root Mean Square Residual (SRMR): $.022 – .035$.

Measurement invariance testing confirms full metric ($\Delta ext{CFI} < .01$) and scalar ($\Delta ext{CFI} < .01$) invariance across biological sex (men vs. women) and relationship types (married vs. unmarried dating individuals), establishing that the measurement instrument assesses the identical latent construct with equal precision across demographic groups.

10. Instrument / Measurement Tool

• Instrument Name: Quality of the Romantic Alternatives Scale (Brief 5-Item Form).
• Theoretical Basis: Interdependence Theory (Kelley & Thibaut, 1978); Investment Model of Commitment Processes (Rusbult, 1980, 1983; Rusbult et al., 1998).
• Construct Assessed: Perceived quality, viability, and appeal of relational (alternative partners) and non-relational (independent/single life) options outside the primary relationship.
• Test Type: Self-report psychometric rating scale.
• Target Population: Individuals currently involved in a romantic relationship (dating, cohabiting, or married), aged 18 and older.
• Number of Items: 5 items.
• Response Scale: 7-point Likert scale (1 = Strongly disagree, 4 = Neither agree nor disagree, 7 = Strongly agree).
• Administration Format: Paper-and-pencil or computerized self-administered survey.
• Completion Time: Approximately 1 to 2 minutes.
• Reverse-Scoring: None. All items are positively keyed toward higher perceived quality of alternatives.
• Scoring Procedure: Calculate the arithmetic mean of all five items. The resulting score ranges from 1.00 to 7.00. Higher composite values indicate a greater perceived quality of alternatives outside the extant romantic relationship, whereas lower scores reflect high perceived relational dependence and lack of viable alternatives.

11. Permissions & Fee and Test Year

The foundational conceptualization of the Quality of Alternatives construct and its parent instrument, the Investment Model Scale, was published by Caryl E. Rusbult and colleagues (Rusbult, 1980, 1983; Rusbult, Martz, & Agnew, 1998). The adaptation and validation of the 5-item scale referenced herein was utilized in research published by Emily N. Garbinsky, Joe J. Gladstone, Hristina Nikolova, and Jenny G. Olson in 2020.

The instrument is considered open-access for scientific, educational, and academic research purposes under standard academic fair-use conventions. No commercial licensing fees or proprietary royalties are required for non-commercial scholarly research, psychological investigations, or institutional research studies. Authors requesting usage in published empirical investigations must provide formal bibliographic citation to the foundational psychometric literature (Rusbult et al., 1998) and relevant domain-specific empirical studies (e.g., Garbinsky et al., 2020). For proprietary clinical software platforms or commercial corporate deployment, permission should be verified through copyright owners of the respective academic journal publishers (e.g., Oxford University Press, American Psychological Association).

12. References

• Finkel, E. J., Rusbult, C. E., Kumashiro, M., & Hannon, P. A. (2002). Dealing with betrayal in close relationships: Does commitment promote forgiveness? Journal of Personality and Social Psychology, 82(6), 956–974. https://doi.org/10.1037/0022-3514.82.6.956
• Garbinsky, E. N., Gladstone, J. J., Nikolova, H., & Olson, J. G. (2020). Love, lies, and money: Financial infidelity in romantic relationships. Journal of Consumer Research, 47(1), 1–24. https://doi.org/10.1093/jcr/ucz052
• Kelley, H. H., & Thibaut, J. W. (1978). Interpersonal relations: A theory of interdependence. John Wiley & Sons.
• Le, B., & Agnew, C. R. (2003). Need fulfillment and persistence in close relationships: Does commitment mediate the relationship? Personal Relationships, 10(2), 175–186. https://doi.org/10.1111/1475-6811.00045
• Maner, J. K., Gailliot, M. T., & Miller, S. L. (2009). The implicit cognition of relationship maintenance: Inattention to attractive alternatives. Journal of Experimental Social Psychology, 45(1), 174–179. https://doi.org/10.1016/j.jesp.2008.08.002
• 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. (1983). A longitudinal test of the investment model: The development (and deterioration) of satisfaction and commitment in heterosexual involvements. Journal of Personality and Social Psychology, 45(1), 101–117. https://doi.org/10.1037/0022-3514.45.1.101
• 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
• Thibaut, J. W., & Kelley, H. H. (1959). The social psychology of groups. John Wiley & Sons.

13. Items of the Scale