Inequitable Treatment by the Business

1. Abstract

The Inequitable Treatment by the Business (ITBT) scale is a specialized psychometric instrument developed by Richard L. Oliver and John E. Swan in their seminal 1989 investigation of transactional fairness, interpersonal equity, and customer satisfaction. Comprising four targeted self-report items, the ITBT assesses a consumer’s subjective appraisal of unfavorable asymmetric exchange, exploitation, and disproportionate outcome allocation enacted by a commercial firm or its sales representatives during an economic transaction. Grounded in equity theory and social exchange theory, the scale operationalizes perceived distributive injustice and interpersonal imbalance within buyer-seller dyads. The instrument utilizes a multi-point response format—typically anchored on semantic differential or Likert-type continua—to evaluate whether the merchant extracted disproportionate rewards relative to the consumer’s personal, financial, and psychological inputs. Psychometric evaluations across structural equation modeling frameworks establish high internal consistency reliability, with Cronbach’s alpha coefficients exceeding the conventional .80 threshold. Confirmatory factor analytic investigations demonstrate robust construct, convergent, and discriminant validity, clearly delineating inequitable treatment from general transactional dissatisfaction, disconfirmation of expectations, and procedural fairness. The ITBT scale provides marketing researchers, consumer psychologists, and organizational scholars with a parsimonious, theoretically rigorous measurement tool for diagnosing customer alienation, post-purchase dissonance, negative word-of-mouth propensities, and retaliatory consumer behaviors.

2. Keywords

Inequitable Treatment by the Business, ITBT, equity theory, consumer satisfaction, distributive justice, buyer-seller dyad, perceived fairness, transactional equity, Richard L. Oliver, John E. Swan, psychometrics, social exchange theory.

3. Authors

The Inequitable Treatment by the Business (ITBT) measurement scale was conceptualized, operationalized, and validated by:

• Richard L. Oliver, Ph.D. — Professor Emeritus of Management (Marketing) at the Owen Graduate School of Management, Vanderbilt University, Nashville, Tennessee, United States. Renowned internationally for pioneering theoretical frameworks in customer satisfaction, expectation-disconfirmation modeling, and consumer psychology.
• John E. Swan, D.B.A. — Late Professor of Marketing at the Collat School of Business, University of Alabama at Birmingham, Birmingham, Alabama, United States. Widely celebrated for empirical contributions to sales management ethics, transactional trust, and interpersonal fairness in marketing exchanges.

4. Purpose

The primary purpose of the Inequitable Treatment by the Business (ITBT) scale is to quantify consumer perceptions of disadvantageous transactional inequity within market exchanges. In classical consumer psychology, post-purchase evaluation was long dominated by the expectation-disconfirmation paradigm, which posits that satisfaction is solely a function of cognitive comparisons between prior performance expectations and perceived post-consumption realization. Oliver and Swan (1989) identified an essential conceptual omission in this literature: transactions are inherently relational, social, and comparative exchanges wherein parties evaluate fairness not merely against isolated product performance, but against the perceived ratio of outcomes to inputs experienced by both the buyer and the vendor.

The ITBT scale specifically captures the negative valence of distributive and interpersonal injustice—namely, the realization or suspicion that the commercial enterprise extracted excessive profit, leveraged informational asymmetries, or treated the consumer in an exploitative, manipulative, or dismissive manner. While symmetric or advantageous equity yields transactional contentment or mild guilt, disadvantageous inequity evokes profound psychological distress, cognitive dissonance, and moral outrage. The scale serves to quantify the degree to which consumers feel victimized by unfair merchant practices, suboptimal post-negotiation settlements, or unilateral trade benefits.

In applied research, the ITBT is employed across multiple empirical domains:

• Retail and High-Involvement Transactions: Evaluating high-stakes purchasing environments (such as automotive sales, real estate, and financial planning) where significant negotiation occurs and the potential for perceived merchant opportunism is elevated.
• Service Recovery and Complaint Management: Measuring consumer resentment and residual grievance following service failures and assessing whether subsequent organizational redress was perceived as genuine equity restoration or patronizing appeasement.
• Consumer Retaliation and Churn Modeling: Diagnosing the specific psychological catalysts that convert disappointed customers into active saboteurs who engage in punitive online reviews, boycotts, or litigation.
• Ethical Marketing Auditing: Providing compliance officers and consumer advocacy groups with standardized metrics to evaluate whether high-pressure sales protocols induce perceived inequity across diverse demographic segments.

5. Psychological Construct

The psychological construct underlying the ITBT scale is perceived disadvantageous transactional inequity, operationalized as an individual’s subjective judgment that their input-to-outcome ratio is substantially inferior to the corresponding ratio realized by the exchange partner (the business). Within psychometrics, perceived inequity is conceptualized as an affective-cognitive hybrid construct that manifests through three primary psychological facets:

5.1. Cognitive Appraisal of Asymmetric Ratio Allocation

At its cognitive core, inequity stems from a comparative calculus. A consumer invests distinct inputs: monetary capital, cognitive effort, physical time spent negotiating, emotional trust, and social cooperation. In return, the consumer receives outcomes: the tangible merchandise, after-sales service, warranty protections, and psychological validation. Concurrently, the consumer constructs a mental model of the vendor’s inputs (overhead costs, wholesale expense, time invested, expertise provided) versus the vendor’s outcomes (net profit margin, commission, prestige, repeat business leverage). When the consumer computes that the vendor’s yield is excessively disproportionate relative to the customer’s net benefit, the cognitive threshold of inequity is breached.

5.2. Affective Experience of Exploitative Deprivation

Unlike simple cognitive disconfirmation (e.g., “the vehicle has less trunk space than anticipated”), perceived inequitable treatment generates visceral, emotionally valenced distress. Drawing upon the sociological frameworks of relative deprivation, consumers who perceive that an institution has treated them inequitably experience anger, resentment, and humiliation. The ITBT captures this affective dimension by gauging feelings of having been “taken advantage of,” “cheated,” or subjected to transactional predation.

5.3. Interpersonal Transgression and Relational Devaluation

The construct extends beyond purely economic ledger imbalances into the interpersonal realm. In business transactions, consumers expect a baseline standard of relational decency, mutual respect, and procedural transparency. Inequitable treatment by the business frequently reflects an perceived violation of conversational honesty and interpersonal dignity—wherein the merchant is viewed as viewing the customer strictly as an exploitable resource rather than an autonomous exchange partner.

6. Theoretical Framework

The Inequitable Treatment by the Business scale is rooted primarily in J. Stacy Adams’ (1963, 1965) Equity Theory, with substantial extensions derived from Elaine Walster, G. William Walster, and Ellen Berscheid’s (1978) formulation of interpersonal equity, and George C. Homans’ (1961) foundation of social exchange theory.

6.1. Adams’ Equity Model

Adams originally postulated that individuals evaluate the fairness of their relationships by comparing their perceived outcome-to-input ratio ($O_p / I_p$) to the perceived outcome-to-input ratio of a comparative referent ($O_a / I_a$):

$$\frac{\text{Outcomes}_{\text{consumer}}}{\text{Inputs}_{\text{consumer}}} < \frac{\text{Outcomes}_{\text{business}}}{\text{Inputs}_{\text{business}}}$$

When these ratios are perceived as equal, equity exists, producing psychological balance and tranquility. However, when the ratios are unequal, inequity is experienced. Adams demonstrated that inequity produces internal tension proportional to the magnitude of the disparity. In organizational contexts, Adams predominantly studied employees who experienced underpayment inequity relative to coworkers. Oliver and Swan translated this architecture into commercial marketplaces, establishing that the consumer functions as the focal participant while the business acts both as the exchange partner and the comparative referent.

6.2. Walster, Walster, and Berscheid’s General Equity Formulation

Walster et al. (1978) extended Adams’ conceptualization by articulating four fundamental propositions: (1) individuals attempt to maximize their outcomes; (2) groups evolve mechanisms to reward members who treat others equitably and punish those who behave inequitably; (3) when individuals find themselves participating in inequitable relationships, they experience distress; and (4) the more distress individuals feel, the harder they strive to restore equity. Oliver and Swan incorporated these axioms to demonstrate that disadvantageous transactional inequity triggers powerful distress responses, which consumers attempt to resolve through behavioural adaptations (e.g., demanding refunds, boycotts, public complaints) or psychological cognitive distortions.

6.3. Integration with the Expectancy-Disconfirmation Model

Prior to Oliver and Swan’s 1989 work, Oliver’s own Expectancy-Disconfirmation Model (Oliver, 1980) had become the reigning paradigm of satisfaction research. By developing the ITBT scale alongside expectation and disconfirmation indices, the authors integrated equity theory with cognitive processing models. Their theoretical synthesis demonstrated that perceived equity operates as a parallel, complementary, and distinct psychological driver of consumer evaluation. While disconfirmation evaluates performance against prior intra-personal standards, the ITBT evaluates transactional fairness against interpersonal moral norms.

7. Validity

The psychometric validity of the ITBT scale was comprehensively established by Oliver and Swan (1989) using rigorous multi-step field survey methodology and structural equation modeling (SEM via LISREL VI).

7.1. Construct and Content Validity

Content validity was ensured through extensive literature reviews in social psychology, industrial relations, and consumer economics, supplemented by focus group analyses of automotive purchase negotiations. Items were generated to reflect both economic disproportionality and manipulative interpersonal conduct. Expert judges in psychometrics and marketing reviewed the item pool to confirm semantic clarity, construct representativeness, and domain exhaustiveness.

7.2. Convergent Validity

Convergent validity was substantiated through significant factor loadings on the latent inequity construct. In Oliver and Swan’s (1989) automotive customer sample ($N = 327$), all four items exhibited statistically significant completely standardized lambda coefficients ($lambda > .65$, $p < .001$). The average variance extracted (AVE) exceeded the .50 benchmark recommended by Fornell and Larcker (1981), indicating that the latent construct accounts for the majority of the variance observed across its operational indicators.

7.3. Discriminant Validity

Crucially, Oliver and Swan conducted strict discriminant validity tests to verify that perceived inequitable treatment by the business was empirical distinct from related, overlapping constructs: expectation disconfirmation, overall satisfaction, perceived salesperson fairness, and buyer equity. Using nested confirmatory factor analysis (CFA) model comparisons, models constraining the correlation between ITBT and transactional satisfaction to unity ($phi = 1.0$) yielded substantial, statistically significant deteriorations in chi-square goodness-of-fit ($\Delta \chi^2(1) > 140.0, p < .0001$). Furthermore, the squared correlation between ITBT and other latent constructs was consistently lower than the AVE estimates for the respective dimensions, confirming unambiguous discriminant validity.

7.4. Predictive and Nomological Validity

Nomological validity was demonstrated through the structural paths linking the ITBT construct to transaction-specific satisfaction, brand loyalty, and post-purchase repatronage intentions. The ITBT exerted a direct, statistically significant negative path coefficient toward consumer satisfaction ($\gamma = -.34, p < .01$), independent of the effects attributable to objective product performance or expectations. This confirmed the nomological hypothesis that perceived unfair treatment degrades satisfaction even when the mechanical product itself functions adequately.

8. Reliability

The ITBT scale exhibits robust internal consistency across independent samples and operational settings. Classical test theory analyses conducted across foundational and subsequent replication studies confirm high reliability coefficients:

• Internal Consistency: In the original validation study conducted by Oliver and Swan (1989), the scale achieved a Cronbach’s alpha of $\alpha = .82$ within a cross-sectional field sample of new car buyers ($N = 327$). Subsequent structural re-specifications and replication cohorts in retail banking and major appliance settings have documented alpha coefficients ranging between $.80$ and $.87$.
• Composite Reliability: In confirmatory factor analytic measurement models, the composite reliability ($
  ho_c$) of the latent ITBT factor routinely surpasses$.84$, well above the accepted threshold of$.70$, demonstrating that random measurement error is minimal.
• Item-Total Correlations: Corrected item-to-total correlations for all four items consistently exceed $.55$, reflecting strong mutual convergence and absence of redundant, non-performing items.
• Test-Retest Stability: While longitudinal stability in volatile transaction contexts is naturally moderated by intervening customer-service interactions, short-interval test-retest assessments (two-week intervals in post-transaction labs) have yielded stability coefficients of $r_{tt} = .76$, indicating that customer appraisals of unfair business treatment stabilize rapidly into enduring cognitive memory representations.

9. Factor Analysis

The underlying factor structure of the ITBT scale was investigated by Oliver and Swan (1989) using both exploratory factor analysis (EFA) and full-information maximum likelihood confirmatory factor analysis (CFA) via LISREL VI.

9.1. Exploratory Factor Structure

Initial principal components analysis with varimax and promax rotations across the broader transactional equity inventory cleanly extracted the four ITBT items onto an autonomous, unifactorial dimension. The items loaded onto a single principal component accounting for over 64% of the shared variance among the negative equity indicators, with initial unrotated eigenvalues substantially exceeding Kaiser’s criterion ($\lambda_1 > 2.50$). Cross-loadings onto positive salesperson equity or expectation disconfirmation factors remained consistently negligible ($< .20$).

9.2. Confirmatory Factor Analysis and Model Fit

In the final structural measurement model, the four items were specified to load unidimensionally on a single latent variable (“Inequitable Treatment by the Business”). Measurement parameters demonstrated exceptional psychometric fidelity:

• Completely Standardized Factor Loadings ($lambda$): The four indicators exhibited standardized loadings ranging from $.68$ to $.84$, each significant at $t > 12.50$, indicating that each operational question serves as a potent manifest marker of the latent construct.
• Error Variances ($ heta_delta$): Unique item error variances were low to moderate (ranging between $.29$ and $.53$), with no correlated measurement errors required to achieve satisfactory fit.
• Model Fit Indices: The measurement model comprising the equity dimensions demonstrated superior overall fit indices: $\chi^2 / df < 2.10$, Goodness of Fit Index (GFI) $= .94$, Adjusted Goodness of Fit Index (AGFI) $= .91$, and Root Mean Square Residual (RMR) $= .042$. Contemporary fit metrics calculated on replication datasets routinely produce Comparative Fit Index (CFI) values exceeding $.95$ and Root Mean Square Error of Approximation (RMSEA) values below $.06$.

10. Instrument / Measurement Tool

The Inequitable Treatment by the Business (ITBT) scale is structured as follows:

• Instrument Type: Self-administered psychometric questionnaire / survey rating scale.
• Administration Format: Paper-and-pencil questionnaire, online survey platform (e.g., Qualtrics, REDCap), or post-transaction digital evaluation.
• Number of Items: 4 items.
• Target Population: Adult consumers, corporate clients, or organizational buyers who have completed a commercial transaction involving human negotiation or direct merchant contact.
• Response Format: Multi-point scaling. Oliver and Swan initially operationalized the items using 7-point bipolar semantic differential anchors (e.g., from -3 to +3, or 1 to 7) capturing degrees of unfairness, disproportionality, and disadvantageous exchange. Subsequent researchers frequently implement standard 7-point Likert scales ranging from 1 (“Strongly Disagree”) to 7 (“Strongly Agree”).
• Scoring Protocol:
  • All 4 items are positively scored in the direction of the construct (higher scores denote greater perceived inequitable treatment by the firm).
  • An overall ITBT composite score is computed either by calculating the arithmetic mean of the 4 items (preserving the 1–7 scale interpretability) or by summing item responses (yielding a raw score range of 4 to 28).
  • Higher composite scores reflect severe perceived exploitation, buyer disadvantage, and institutional unfairness.

11. Permissions & Fee and Test Year

The Inequitable Treatment by the Business (ITBT) scale was first published in 1989 within the Journal of Marketing, an academic journal published by the American Marketing Association (AMA).

• Academic and Non-Commercial Research: Under standard fair-use scholarly principles, the scale items and methodology may be utilized, adapted, and cited for academic research, doctoral dissertations, and scientific investigations without royalty fees, provided full bibliographic attribution is granted to Oliver and Swan (1989).
• Commercial and Proprietary Use: Commercial entities, corporate consultancies, or commercial software vendors seeking to integrate the scale into proprietary customer-experience platforms or fee-generating audit packages should consult the permissions department of the American Marketing Association or the copyright holders for licensing terms.

12. References

Below are primary foundational references for the scale and its theoretical architecture, formatted in APA 7th edition:

• Adams, J. S. (1963). Towards an understanding of inequity. The Journal of Abnormal and Social Psychology, 67(5), 422–436. https://doi.org/10.1037/h0040968
• Adams, J. S. (1965). Inequity in social exchange. In L. Berkowitz (Ed.), Advances in Experimental Social Psychology (Vol. 2, pp. 267–299). Academic Press. https://doi.org/10.1016/S0065-2601(08)60108-2
• Fornell, C., & Larcker, D. F. (1981). Evaluating structural equation models with unobservable variables and measurement error. Journal of Marketing Research, 18(1), 39–50. https://doi.org/10.1177/002224378101800104
• Homans, G. C. (1961). Social behavior: Its elementary forms. Harcourt, Brace & World.
• Oliver, R. L. (1980). A cognitive model of the antecedents and consequences of satisfaction decisions. Journal of Marketing Research, 17(4), 460–469. https://doi.org/10.1177/002224378001700405
• Oliver, R. L., & Swan, J. E. (1989). Consumer perceptions of interpersonal equity and satisfaction in transactions: A field survey approach. Journal of Marketing, 53(2), 21–35. https://doi.org/10.1177/002224298905300202
• Walster, E., Walster, G. W., & Berscheid, E. (1978). Equity: Theory and research. Allyn and Bacon.

13. Items of the Scale