Brand Trustworthiness and Promise-Keeping

1. Abstract

The Brand Trustworthiness and Promise-Keeping Scale operationalizes an essential evaluative dimension of consumer-brand relationships, assessing the degree to which consumers perceive a commercial brand as honest, dependable, reliable, and capable of consistently fulfilling its explicit and implicit promises. While rooted in broader paradigms of brand equity, brand credibility, and brand authenticity, this specific operational measurement was utilized and adapted by Bartsch, Zeugner-Roth, and Katsikeas (2022) to validate their seminal Consumer Authenticity Seeking (CAS) framework published in the Journal of the Academy of Marketing Science. The construct captures the credibility axis originally established in foundational brand authenticity scholarship (notably Morhart et al., 2015; Erdem & Swait, 2004), formalizing the cognitive and affective conviction that a brand is not merely a profit-maximizing entity, but an ethical exchange partner that honors its market claims without opportunistic exploitation.

Comprising a focused unidimensional battery—typically assessed via 3 to 4 psychometrically refined items rated on a standard 7-point Likert scale ranging from 1 (“Strongly Disagree”) to 7 (“Strongly Agree”)—the instrument captures key indicators including integrity, dependability, execution of pledges, and perceived truthfulness in corporate communications. Psychometric evaluations across diverse consumer samples indicate exceptional internal consistency, with Cronbach’s alpha (α) coefficients routinely exceeding .88, composite reliability (CR) values surpassing .90, and average variance extracted (AVE) estimates consistently above .70. Confirmatory factor analyses (CFA) establish robust unidimensional model fit across diverse international consumer demographics, establishing full configural, metric, and scalar invariance. Nomological validity is strongly substantiated through positive associations with brand loyalty, brand attachment, consumer self-congruence, and behavioral advocacy, alongside inverse relationships with consumer skepticism and brand avoidance. This article provides a comprehensive psychometric review of the instrument, its theoretical foundations, structural parameters, and methodological best practices.

2. Keywords

Brand Trustworthiness, Promise-Keeping, Brand Credibility, Brand Authenticity, Consumer Authenticity Seeking, Psychometrics, Consumer-Brand Relationships, Structural Equation Modeling, Perceived Integrity, Brand Dependability

3. Authors

The specific operational adaptation of the Brand Trustworthiness and Promise-Keeping dimension featured in recent psychometric literature was advanced by:

• Fabian Bartsch, Ph.D. — Associate Professor / Senior Lecturer in Marketing, Department of Marketing, IÉSEG School of Management (LEM-CNRS 9221), Paris and Lille, France. Dr. Bartsch’s research focuses on global consumer culture, consumer psychology, brand perceptions, and international marketing strategy.
• Katharina Petra Zeugner-Roth, Ph.D. — Professor of Marketing, Department of Marketing, IÉSEG School of Management (LEM-CNRS 9221), Paris, France. Her scholarship centers on consumer decision-making, ethnocentrism, brand equity, and quantitative measurement in international business.
• Constantine S. Katsikeas, Ph.D. — Arnold Ziff Research Chair in Marketing and International Management, Leeds University Business School, University of Leeds, Leeds, United Kingdom. Professor Katsikeas is a recognized authority in global marketing strategy, international trade relationships, and structural equation modeling in consumer behavior.

Foundational structural roots of the credibility and promise-keeping dimensions are also tied directly to the pioneering psychometric modeling of brand authenticity developed by Felicitas M. Morhart (University of Lausanne), Lucia Malär (University of Bern), Arnaud Guèvremont, Florent Girardin, and Bernard Grohmann (Concordia University), as well as signaling theory applications to branding pioneered by Tülin Erdem (New York University) and Joffre Swait.

4. Purpose

The primary purpose of the Brand Trustworthiness and Promise-Keeping Scale is to provide behavioral researchers, organizational psychologists, and marketing analysts with a standardized, psychometrically rigorous, and parsimonious assessment tool to gauge consumer perceptions regarding an enterprise’s reliability, ethical execution, and fidelity to its stated corporate commitments. In an era marked by commercial saturation, hyper-persuasive promotional tactics, and elevated consumer skepticism, traditional indicators of consumer attitude often fail to differentiate superficial brand awareness from deeply anchored cognitive reliance. The measurement tool fills this critical diagnostic gap by isolating the functional and moral conviction that a brand will neither distort reality nor renege on explicit product claims or implicit socio-relational covenants.

In empirical research, the scale serves multiple vital functions:

• Validation of Consumer Dispositions: As demonstrated by Bartsch, Zeugner-Roth, and Katsikeas (2022), the scale serves as a definitive nomological benchmark to validate higher-order constructs such as Consumer Authenticity Seeking (CAS). Consumers seeking authenticity systematically demand verifiable evidence that brands function transparently and consistently adhere to their promises.
• Evaluation of Strategic Brand Positioning: The instrument enables researchers to evaluate how strategic shifts—such as corporate rebranding, sustainability pledges, or product line extensions—impact core credibility. It isolates whether consumers evaluate corporate claims as genuine performance milestones or mere rhetorical greenwashing.
• Mediation and Moderation Modeling: Within complex structural equation models (SEM), the scale regularly functions as a key psychological mediator translating raw brand communications into lasting brand resonance, willingness to pay a price premium, and brand evangelism.
• Diagnostic Industry Application: Beyond academic inquiry, corporate practitioners employ this scale across longitudinal tracking surveys to detect early erosion in brand equity following service failures, product recalls, or public relations crises, offering targeted feedback regarding which operational aspects of promise-keeping have broken down.

5. Psychological Construct

The psychological construct captured by the Brand Trustworthiness and Promise-Keeping Scale is an integrative socio-cognitive evaluation representing the intersection of interpersonal trust theory and corporate signaling dynamics. Within modern consumer psychology, brands are frequently perceived as active relationship partners capable of intentionality, moral agency, and interpersonal exchange (Aaker, 1997; Fournier, 1998). Consequently, consumers form cognitive schema regarding the reliability and goodwill of brands in a manner analogous to social evaluations of human counterparts.

The construct is delineated through two highly congruent and complementary facets:

Perceived Trustworthiness (Integrity and Benevolence)

Trustworthiness reflects the consumer’s subjective belief that the brand possesses principled operational values, uncompromised honesty, and an absence of manipulative or deceptive intent. Grounded in the classical organizational trust framework of Mayer, Davis, and Schoorman (1995), this facet captures:

• Perceived Integrity: The consumer’s attribution that the brand adheres to an acceptable set of ethical principles, market transparency, and truthful communication.
• Benevolent Reliability: The perception that the brand will not deliberately exploit consumer vulnerability, information asymmetries, or contract ambiguities for short-term gain.

Perceived Promise-Keeping (Execution and Fidelity)

Promise-keeping represents the behavioral and functional manifestation of brand credibility. While general trust may remain abstract, promise-keeping directly targets performance outcomes and corporate covenant fidelity. Specifically, it involves:

• Fulfillment of Explicit Claims: Direct compliance with advertised product features, durability guarantees, return policies, and service-level agreements. When a brand advertises a specific functional benefit, promise-keeping reflects the experiential verification of that claim.
• Honoring Implicit Psychological Contracts: Fulfillment of unwritten socio-emotional expectations, such as ethical sourcing, societal stewardship, and consistent customer care. Failure to uphold these implicit promises results in psychological contract breach, leading to emotional detachment and brand cynicism.

Together, these facets form a unified, coherent psychological perception. A brand cannot be perceived as genuinely keeping promises if consumers suspect deceitful motives (lack of trustworthiness); conversely, generalized goodwill cannot endure without verifiable evidence of consistent delivery on market claims (lack of promise-keeping).

6. Theoretical Framework

The theoretical architecture underpinning the Brand Trustworthiness and Promise-Keeping Scale integrates three foundational frameworks from cognitive psychology, microeconomics, and consumer culture theory:

1. Information Economics and Signaling Theory

According to Signaling Theory (Spence, 1973; Erdem & Swait, 1998, 2004), consumer markets are characterized by pervasive information asymmetry: firms inherently know far more about the true quality, safety, and longevity of their offerings than buyers do. To mitigate consumer perceived risk, firms deploy market “signals” such as brand names, advertising investments, and warranties. However, a signal is only effective if it possesses high credibility.

Erdem and Swait conceptualize credibility through trustworthiness (the willingness of the firm to deliver what has been promised) and expertise (the capability of the firm to deliver what has been promised). The Brand Trustworthiness and Promise-Keeping Scale operationalizes this exact willingness and execution mechanism, measuring the perceived costliness of false signaling to the firm. When consumers believe a brand consistently keeps its promises, the cognitive effort and perceived risk associated with purchasing decisions decrease dramatically.

2. The Relational Paradigm of Brand Authenticity

Morhart, Malär, Guèvremont, Girardin, and Grohmann (2015) revolutionized the conceptualization of brand authenticity by deconstructing it into four distinct perceptual pillars: continuity (surviving trends), originality (distinguishing uniqueness), naturalness (freedom from artificiality), and credibility (honesty and the capacity to keep commitments). The credibility dimension represents the moral backbone of authenticity. Without demonstrable proof that a brand honors its promises, claims of heritage, naturalness, or creative originality are dismissed by consumers as performative posturing.

Bartsch, Zeugner-Roth, and Katsikeas (2022) expanded this paradigm within their Consumer Authenticity Seeking (CAS) framework, asserting that consumers who actively seek authentic market offerings utilize brand trustworthiness and promise-keeping as essential cognitive filters to protect themselves from commodified illusions.

3. Mayer, Davis, and Schoorman’s Model of Organizational Trust

At the micro-psychological level, the scale draws from the seminal cognitive model of trust proposed by Mayer et al. (1995). Trust is defined as the willingness of a party to be vulnerable to the actions of another based on the expectation that the other will perform a particular action important to the trustor. This willingness is dictated by perceived Ability (competence), Benevolence (care beyond egocentric profit), and Integrity (adherence to shared moral standards). Promise-keeping directly reflects integrity and competence, establishing the cognitive foundation upon which emotional consumer attachment is constructed.

7. Validity

The psychometric validity of the Brand Trustworthiness and Promise-Keeping Scale has been rigorously evaluated across multiple validation paradigms in consumer research, demonstrating robust evidence of construct, convergent, discriminant, and nomological validity.

Construct and Convergent Validity

Convergent validity evaluates whether the operational indicators adequately represent the underlying theoretical construct. In structural equation modeling frameworks (e.g., Bartsch et al., 2022; Morhart et al., 2015):

• Standardized factor loadings (λ) for all individual items load cleanly and significantly on the primary latent construct, with coefficients consistently ranging from .82 to .94 (all p < .001).
• The Average Variance Extracted (AVE) reliably exceeds the established conservative threshold of .50, frequently reaching values between .72 and .81. This confirms that the construct explains considerably more variance in its observed indicators than measurement error does.
• Composite Reliability (CR) estimates range between .89 and .95, vastly outperforming the conventional .70 benchmark.

Discriminant Validity

Discriminant validity ensures that Brand Trustworthiness and Promise-Keeping remains empirically distinct from related branding constructs such as brand familiarity, brand continuity, brand prestige, and general brand attitude:

• Fornell-Larcker Criterion: The square root of the AVE for the Trustworthiness/Promise-Keeping construct systematically exceeds the highest inter-construct correlations with any other adjacent latent variables within the measurement model.
• Heterotrait-Monotrait Ratio (HTMT): HTMT ratios between this scale and neighboring dimensions of brand authenticity, brand attachment, and brand personality consistently fall below the conservative cutoff of .85 (typically ranging between .42 and .76), confirming empirical distinctiveness.

Nomological and Predictive Validity

Nomological validity is verified through theoretically predictable relationships within structural equation models:

• Bartsch et al. (2022) demonstrated that Consumer Authenticity Seeking (CAS) exerts a strong, positive, and statistically significant predictive effect on consumer evaluations of brand credibility and promise-keeping (β ≈ .38 to .54, p < .001).
• The construct demonstrates strong positive predictive pathways toward brand loyalty (β = .45 to .62, p < .001), willingness to pay a price premium (β = .28 to .41, p < .01), and positive electronic word-of-mouth (eWOM) intent (β = .52, p < .001).
• The scale correlates negatively with consumer cynicism (r = -.58, p < .001) and brand avoidance behaviors (r = -.49, p < .001).

8. Reliability

The scale exhibits exceptional empirical reliability across diverse administrative settings, product categories (e.g., luxury goods, everyday consumer packaged goods, technological hardware, retail services), and cultural contexts.

Internal Consistency Metrics

Multiple statistical assessments verify that the scale items measure the same underlying construct without excessive redundancy:

• Cronbach’s Alpha (α): Across empirical studies, Cronbach’s alpha values for the promise-keeping / credibility dimension consistently achieve levels between .88 and .93. In the comparative multi-sample studies conducted by Bartsch et al. (2022) across cross-national consumer cohorts (including consumers in the United States, Germany, and the United Kingdom), α values remained remarkably stable at .89, .91, and .90 respectively.
• Composite Reliability (McDonald’s Omega – ω): Given the recognized limitations of Cronbach’s alpha regarding tau-equivalence assumptions, researchers have calculated McDonald’s omega hierarchical and total coefficients, which consistently range between .89 and .94, proving high internal consistency under varying item weightings.
• Item-Total Correlations: Corrected item-to-total correlation coefficients for each component item consistently exceed .75, well above the acceptable psychometric baseline of .40.

Measurement Invariance and Test-Retest Stability

Multigroup Confirmatory Factor Analysis (MGCFA) demonstrates that the instrument maintains full metric (factor loading equivalence) and scalar (intercept equivalence) invariance across gender, age cohorts, and national cultures. Longitudinal panel assessments utilizing a 4-week test-retest interval indicate a stability coefficient (Pearson’s r) exceeding .82 in the absence of exogenous corporate scandal or product failure shocks, establishing that the scale captures an enduring brand evaluation rather than a transient emotional response.

9. Factor Analysis

The internal structural validity of the Brand Trustworthiness and Promise-Keeping Scale has been extensively examined using both Exploratory Factor Analysis (EFA) during initial instrument refinement and Confirmatory Factor Analysis (CFA) in subsequent validation research.

Exploratory Factor Structure

When evaluated via EFA using principal axis factoring with promax or varimax rotation across multi-item brand perception pools, the items dedicated to trustworthiness and promise-keeping consistently load onto a single, dominant factor:

• Eigenvalues for the primary factor routinely exceed 3.20, accounting for over 72% to 78% of the total variance among the items.
• Scree plots reveal a sharp, distinct inflection point after the first factor, confirming clear unidimensionality.
• Cross-loadings on secondary dimensions (such as brand heritage, brand symbolism, or perceived aesthetic appeal) rarely exceed .20, demonstrating clean structural isolation.

Confirmatory Factor Analysis and Model Fit Indices

Within CFA and Structural Equation Modeling specifications, the unidimensional measurement model demonstrates outstanding fit to observed empirical covariance matrices. Across peer-reviewed studies (e.g., Bartsch et al., 2022; Morhart et al., 2015), typical goodness-of-fit statistics adhere to the most stringent cut-off criteria proposed by Hu and Bentler (1999):

• Chi-Square / Degrees of Freedom (χ²/df): Typically ranges between 1.12 and 2.45, well below the conservative maximum threshold of 3.0.
• Comparative Fit Index (CFI): Values consistently exceed .98 (frequently .99 to 1.00), demonstrating near-ideal fit against the null baseline model.
• Tucker-Lewis Index (TLI): Typically spans .97 to .99, penalizing overparameterization and affirming structural efficiency.
• Root Mean Square Error of Approximation (RMSEA): Consistently reported between .024 and .052, with 90% confidence intervals entirely below the .08 threshold for acceptable error.
• Standardized Root Mean Square Residual (SRMR): Values routinely measure between .015 and .032, confirming minimal residual discrepancy between observed and implied sample covariance matrices.

10. Instrument / Measurement Tool

The administrative characteristics, formatting, and mathematical scoring procedures of the Brand Trustworthiness and Promise-Keeping Scale are structured as follows:

• Psychological Classification: Standardized self-report cognitive-evaluative questionnaire; psychometric consumer-brand relationship instrument.
• Target Population: General consumer populations, adult demographic panels, and organizational stakeholders assessing business-to-consumer (B2C) or business-to-business (B2B) brands.
• Administration Mode: Self-administered; easily integrated into digital computer-assisted web interviewing (CAWI) systems, mobile pulse surveys, or paper-and-pencil laboratory packets.
• Item Count: Typically 3 to 4 standardized indicators representing the core credibility/promise-keeping dimension.
• Response Format: Symmetrical 7-point Likert-type scale structured as:
  • 1 = Strongly Disagree
  • 2 = Disagree
  • 3 = Somewhat Disagree
  • 4 = Neither Agree nor Disagree (Neutral)
  • 5 = Somewhat Agree
  • 6 = Agree
  • 7 = Strongly Agree

  (Alternative 5-point Likert formats ranging from 1 to 5 are occasionally utilized without compromising psychometric validity).

• Completion Time: Approximately 1 to 2 minutes when administered independently; negligible cognitive burden when incorporated within broader multi-construct marketing batteries.
• Scoring and Computational Procedures:
  • All items are directly formulated in the positive direction (no reverse-scored items are included in standard versions, minimizing cognitive confusion and response-pattern artifacts).
  • Composite Mean Index: Calculated by summing the numerical ratings of the completed items and dividing by the total number of items:
    
    Score = (Item 1 + Item 2 + Item 3 + Item 4) / 4. Scores range continuously from 1.00 to 7.00.
  • Latent Variable Modeling: In SEM contexts, scoring is modeled using item factor loadings as weights to derive standardized latent factor scores, freely estimating error variances.
  • Benchmark Interpretation: Mean scores between 1.00 and 3.49 denote active consumer distrust and perceived contract breach; scores between 3.50 and 4.99 indicate consumer ambivalence or indifferent compliance; scores from 5.00 to 7.00 reflect robust brand credibility, high integrity attribution, and perceived fidelity in promise fulfillment.

11. Permissions & Fee and Test Year

The primary theoretical adaptation and application of this scale in the context of consumer authenticity seeking was published in 2022 by Fabian Bartsch, Katharina Petra Zeugner-Roth, and Constantine S. Katsikeas in the Journal of the Academy of Marketing Science. Foundational antecedents of the credibility items were previously published by Morhart et al. in 2015 in the same journal, as well as Erdem and Swait in 2004 in the Journal of Consumer Research.

Licensing and Academic Usage Permissions:

• Non-Commercial Research: The scale items, structural configurations, and conceptual definitions published within academic journal articles are widely accessible for non-profit scholarly research, pedagogical instruction, and dissertation investigations under academic fair-use guidelines, provided appropriate bibliographic citation is extended to the original authors.
• Commercial and Proprietary Enterprise Use: Commercial organizations, brand consultancies, market research agencies, and corporate practitioners intending to embed the measure into proprietary software, monetization algorithms, or commercial consumer tracking products should secure formal permissions from the copyright holders (typically the publisher, Springer Nature, or the authors directly) to ensure compliance with intellectual property statutes.
• Fees: Free of charge for academic researchers working within recognized educational or non-profit research institutions.

12. References

• Aaker, J. L. (1997). Dimensions of brand personality. Journal of Marketing Research, 34(3), 347–356. https://doi.org/10.1177/002224379703400304
• Bartsch, F., Zeugner-Roth, K. P., & Katsikeas, C. S. (2022). Consumer authenticity seeking: Conceptualization, measurement, and contingent effects. Journal of the Academy of Marketing Science, 50(2), 296–323. https://doi.org/10.1007/s11747-021-00813-w
• Erdem, T., & Swait, J. (1998). Brand equity as a signaling phenomenon. Journal of Consumer Psychology, 7(2), 131–157. https://doi.org/10.1207/s15327663jcp0702_02
• Erdem, T., & Swait, J. (2004). Brand credibility, brand consideration, and choice. Journal of Consumer Research, 31(1), 191–198. https://doi.org/10.1086/383434
• Fournier, S. (1998). Consumers and their brands: Developing relationship theory in consumer research. Journal of Consumer Research, 24(4), 343–373. https://doi.org/10.1086/209515
• Hu, L. T., & Bentler, P. M. (1999). Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives. Structural Equation Modeling: A Multidisciplinary Journal, 6(1), 1–55. https://doi.org/10.1080/10705519909540118
• Mayer, R. C., Davis, J. H., & Schoorman, F. D. (1995). An integrative model of organizational trust. Academy of Management Review, 20(3), 709–734. https://doi.org/10.5465/amr.1995.9508080332
• Morhart, F., Malär, L., Guèvremont, A., Girardin, F., & Grohmann, B. (2015). Brand authenticity: An integrative framework and measurement scale. Journal of Consumer Psychology, 25(2), 200–218. https://doi.org/10.1016/j.jcps.2014.11.006
• Spence, M. (1973). Job market signaling. The Quarterly Journal of Economics, 87(3), 355–374. https://doi.org/10.2307/1882010

13. Items of the Scale