Motivation to Avoid Food Waste Scale (MAFW)

1. Abstract

The Motivation to Avoid Food Waste Scale (MAFW) is a 21-item psychometric instrument engineered to evaluate consumer motives for preventing and reducing household food waste across four distinct psychological and socio-behavioral dimensions: Environmental, Moral, Financial, and Social motivations. Developed and validated by Ribbers, Geuens, Pandelaere, and van Herpen (2023) through a rigorous multi-stage, three-study empirical program, the instrument addresses critical conceptual and operational gaps in environmental psychology, consumer behavior, and sustainability research. Rather than operationalizing motivation as an undifferentiated, unitary drive, the MAFW scale treats motivation at the macro level as a formative construct composed of four internally coherent, reflective first-order subscales. Consequently, combining the subscale scores into an aggregate overall index is psychometrically discouraged, as distinct motivational profiles exert divergent behavioral influences.

Administered using a standard 7-point Likert response format (ranging from 1 = Strongly Disagree to 7 = Strongly Agree), the MAFW exhibits robust psychometric properties across both United Kingdom and United States consumer cohorts. Confirmatory factor analyses confirm the stability of the proposed four-factor structure, demonstrating superior fit indices over rival unidimensional and hierarchical models (e.g., Comparative Fit Index [CFI] > .95, Root Mean Square Error of Approximation [RMSEA] < .06). Subscale internal consistencies are uniformly elevated, with Cronbach’s alpha (α) and McDonald’s omega (ω) coefficients consistently surpassing .85. Longitudinal stability assessed via two-week test–retest assessments confirms high intraclass correlation coefficients. Furthermore, predictive validity testing demonstrates that the scale systematically predicts real-world household food provisioning, surplus management, and disposal behaviors, distinguishing consumers motivated by financial thrift from those driven by biosperic concerns, ethical duty, or social presentation. The MAFW scale constitutes a foundational diagnostic and evaluative tool for public policy design, behavioral intervention testing, and market segmentation.

2. Keywords

Motivation to Avoid Food Waste Scale, MAFW, food waste reduction, environmental motivation, moral guilt, financial thrift, social norm anxiety, consumer psychometrics, pro-environmental behavior, behavioral segmentation, scale validation, household sustainability.

3. Authors

• Dorien Ribbers — Department of Marketing, Innovation and Organisation, Faculty of Economics and Business Administration, Ghent University, Ghent, Belgium; Marketing and Consumer Behaviour Group, Wageningen University & Research, Wageningen, The Netherlands.
• Maggie Geuens — Department of Marketing, Innovation and Organisation, Faculty of Economics and Business Administration, Ghent University, Ghent, Belgium.
• Mario Pandelaere — Department of Marketing, Pamplin College of Business, Virginia Tech, Blacksburg, Virginia, USA; Department of Marketing, Innovation and Organisation, Ghent University, Ghent, Belgium.
• Erica van Herpen — Marketing and Consumer Behaviour Group, Wageningen University & Research, Wageningen, The Netherlands.

4. Purpose

Household food waste accounts for a substantial proportion of aggregate global food losses, driving severe ecological degradation, municipal waste overflow, greenhouse gas emissions, and economic inefficiency. Despite proliferating informational and behavioral campaigns, consumer food waste remains stubbornly persistent. A prominent limitation in antecedent literature has been the lack of a standardized, psychometrically validated measurement scale specifically calibrated to assess consumer motivations to prevent food waste. Previously, investigators relied on single-item indicators, generalized environmental concern inventories (such as the New Ecological Paradigm), or ad-hoc questions lacking construct, discriminant, or predictive validation.

The principal purpose of the Motivation to Avoid Food Waste Scale (MAFW) is to provide a theoretically grounded, psychometrically robust instrument that systematically measures the multidimensional motivational forces governing household food preservation and discard decisions. Grounded in consumer psychology, self-determination theory, and cognitive appraisal frameworks, the MAFW scale delineates four core drivers: the ecological impact of waste, moral and ethical obligations regarding global resource allocation, direct monetary loss, and social evaluation or peer judgment. Disentangling these mechanisms is critical because individuals frequently alter their provisioning, storage, preparation, and disposal routines in response to radically different psychological cues.

In applied research, the MAFW functions as a granular diagnostic instrument. It allows behavioral scientists, municipal sustainability officers, and policymakers to segment populations into discrete behavioral typologies. For instance, interventions designed around carbon footprint messaging may strongly resonate with consumers high in environmental motivation but completely fail to engage consumers driven exclusively by financial cost or social conformity. Clinically and socially, understanding the role of moral guilt and normative anxiety helps illuminate maladaptive or stressful dynamics surrounding meal preparation, household labor, and family consumption patterns. Furthermore, the MAFW serves as an essential pre- and post-intervention evaluative metric to assess which psychological dimensions are shifted by targeted nudges, educational campaigns, or economic incentives.

5. Psychological Construct

The MAFW scale operationalizes consumer motivation to prevent food waste as a multifaceted psychological construct. Motivation in this context represents the internal cognitive, emotional, and normative inclinations that direct individual effort toward minimizing the loss of edible food. The construct encompasses four distinct, theoretically anchored dimensions:

1. Environmental Motivation

The environmental dimension captures an individual’s biospheric awareness and systemic ecological concern regarding the environmental consequences of discarded food. This dimension reflects an understanding that wasted food embodies embedded freshwater, agricultural land use, synthetic fertilizer runoff, transportation emissions, and methane generation within landfill systems. A consumer scoring high on this subscale is motivated to conserve food as an act of planetary stewardship and ecological protection, aligning daily household management with broader environmental values.

2. Moral Motivation

The moral dimension reflects internalized ethical imperatives, deontological duties, and the emotional anticipation of guilt or shame associated with throwing edible sustenance away. Food possesses profound cultural, symbolic, and existential significance across human societies; wasting it is frequently appraised as an affront to human solidarity, particularly against the backdrop of global hunger, poverty, and resource inequality. This subscale measures the internal ethical distress, personal compunction, and moral discomfort an individual experiences when discarding food that could have sustained human life.

3. Financial Motivation

The financial dimension embodies economic utility, resource conservation, and aversion to perceived monetary loss. Food purchases constitute an ongoing household expenditure; discarding spoiled or unused food equates to the direct loss of personal financial resources. This subscale measures the desire to maximize household budgetary efficiency, minimize financial wastefulness, and avoid the psychic pain of paying for items that are ultimately disposed of without consumption. Unlike altruistic or biospheric drivers, this motivation is primarily instrumental and self-oriented.

4. Social Motivation

The social dimension captures interpersonal evaluation apprehension, social norm compliance, and image management concerns regarding how one’s food waste behaviors are judged by family, peers, and society. Drawing from social identity and impression management theories, this construct assesses an individual’s anxiety about being perceived by significant others as irresponsible, wasteful, incompetent, or uncultured. Consumers driven by social motivation regulate their food management practices to maintain social standing, adhere to perceived subjective norms, and avoid peer sanction or interpersonal embarrassment.

6. Theoretical Framework

The conceptual architecture of the MAFW scale integrates multiple complementary theoretical paradigms within social psychology, behavioral economics, and consumer research:

Value-Belief-Norm (VBN) Theory

Grounded in the foundational work of Paul C. Stern and colleagues, Value-Belief-Norm (VBN) Theory posits that pro-environmental actions stem from a causal chain running from core personal values (biospheric, altruistic, and egoistic) to ecological beliefs, the adverse consequences of human actions, and activated personal norms. The MAFW directly reflects this typology: Environmental motivation maps onto biospheric values, Moral motivation reflects altruistic and humanistic concerns, and Financial motivation mirrors egoistic resource preservation. The scale captures the psychological activation of these latent values as concrete behavioral intentions within the domestic food domain.

Theory of Planned Behavior (TPB)

Under Icek Ajzen’s Theory of Planned Behavior, human behavior is governed by attitudes toward the behavior, subjective norms, and perceived behavioral control. While traditional TPB applications often treat subjective norms superficially via generic peer approval items, the MAFW scale elaborates the normative construct into distinct moral (internalized injunctive norms) and social (externalized subjective norms and evaluation concerns) mechanisms. By differentiating internal moral guilt from external social surveillance, the scale provides superior predictive granularity over basic TPB formulations.

Formative vs. Reflective Measurement Paradigm

A central psychometric pillar articulated by Ribbers et al. (2023) is the macro-level formative nature of overall food waste motivation, contrasted with the reflective nature of each individual subscale. In a reflective model, latent factors cause item responses, implying that items should strongly covary and that a single higher-order construct drives all dimensions. However, motivation to avoid food waste does not operate as an undifferentiated general factor; an individual may exhibit extreme financial motivation while maintaining complete indifference toward environmental sustainability, or vice versa. Therefore, the four subscales form the overarching psychological phenomenon without necessarily co-varying uniformly. Consequently, the authors explicitly dictate that the MAFW must not be collapsed into a single summed index, preserving the distinct diagnostic identity of each motivational vector.

7. Validity

The MAFW scale underwent an extensive validation protocol across multiple independent samples in the United Kingdom and the United States, providing empirical support for its construct, convergent, discriminant, and predictive validity.

Construct and Convergent Validity

Convergent validity was verified using Average Variance Extracted (AVE) and standardized factor loadings. Across confirmatory factor analytic evaluations, all 21 items exhibited high standardized loadings on their designated latent factors (all λ ≥ .70, p < .001). For each of the four subscales, the AVE comfortably exceeded the recommended .50 threshold, demonstrating that the latent constructs account for more than half of the variance observed in their respective measurement indicators.

Discriminant Validity

Discriminant validity between the four dimensions was established using the Fornell–Larcker criterion and the Heterotrait-Monotrait ratio of correlations (HTMT). The square root of the AVE for each latent factor was significantly greater than any bivariate correlation between that factor and any other factor in the model. Furthermore, all HTMT values remained well below the conservative .85 cutoff, confirming that while the four motivations are conceptually related within the broader domain of consumer food conservation, they represent empirically distinct psychological entities.

Predictive and Nomological Validity

Nomological networks and predictive efficacy were evaluated against concrete self-reported and objective household behaviors:

• Environmental Motivation: Specifically and strongly predicted green consumption patterns, engagement in home composting, purchasing of visually imperfect (sub-optimal) produce, and general pro-environmental civic behaviors.
• Moral Motivation: Correlated robustly with feelings of personal guilt following discard events, active avoidance of over-purchasing, and donations to surplus food networks.
• Financial Motivation: Systematically predicted price-conscious grocery behaviors, meticulous planning of shopping lists, strategic consumption of leftovers, and rigorous freezer inventory rotation.
• Social Motivation: Predicted conspicuous waste prevention behaviors during social gatherings, adherence to household dining etiquette, and heightened sensitivity to social desirability in consumption contexts.

8. Reliability

The MAFW scale exhibits high internal consistency reliability and temporal stability across diverse demographic cohorts.

Internal Consistency

Across the development and validation samples documented by Ribbers et al. (2023), internal consistency reliability was assessed utilizing both Cronbach’s alpha (α) and McDonald’s omega hierarchical (ω):

• Environmental Subscale: α = .91 to .94; ω = .92 to .94
• Moral Subscale: α = .88 to .92; ω = .89 to .92
• Financial Subscale: α = .87 to .91; ω = .88 to .91
• Social Subscale: α = .89 to .93; ω = .90 to .93

All values comfortably surpass the standard psychometric threshold of .70 for research instruments and .80 for applied diagnostic tools, indicating minimal measurement error within each latent dimension.

Test–Retest Reliability

Temporal stability was evaluated across a two-week interval with a dedicated retest sample. Intraclass Correlation Coefficients (ICC, two-way mixed effects, absolute agreement) for the subscales ranged between .78 and .86, demonstrating that individual motivational profiles remain stable over time in the absence of exogenous shocks or educational interventions.

9. Factor Analysis

The latent structure of the MAFW was rigorously established through an integrated Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) sequence across independent participant pools.

Exploratory Factor Analysis (EFA)

An initial pool of candidate items generated from qualitative consumer interviews and theoretical synthesis was administered to an initial UK consumer sample (Study 1). Principal Axis Factoring with Oblique (Promax) rotation was conducted, as the latent motivational dimensions were expected to correlate moderately. The Kaiser-Meyer-Olkin (KMO) measure of sampling adequacy was .93, and Bartlett’s Test of Sphericity was highly significant (p < .001). Scree plot inspection and parallel analysis unambiguously converged on a four-factor solution accounting for over 65% of the total cumulative variance. Items exhibiting weak primary loadings (< .60) or cross-loadings (> .30) were iteratively eliminated, yielding a refined 21-item instrument.

Confirmatory Factor Analysis (CFA)

The stability of the four-factor structure was subsequently tested in independent cross-validation samples in the UK and USA (Studies 2 and 3) using maximum likelihood estimation with robust standard errors (MLR). The hypothesized four-factor first-order oblique model demonstrated exceptional goodness-of-fit:

• χ² / df ratio < 2.5
• Comparative Fit Index (CFI): ≥ .96
• Tucker-Lewis Index (TLI): ≥ .95
• Root Mean Square Error of Approximation (RMSEA): .048 (90% CI: [.041, .055])
• Standardized Root Mean Square Residual (SRMR): .042

To confirm model superiority, competing models were evaluated. A unidimensional model (collapsing all 21 items onto a single latent motivation factor) exhibited very poor fit (CFI < .65, RMSEA > .14). Similarly, higher-order hierarchical models where a single second-order “general motivation” factor explained the four first-order factors showed significantly degraded fit compared to the oblique four-factor structure, affirming the authors’ conclusion that the top-level construct is formative rather than reflective.

10. Instrument / Measurement Tool

• Instrument Name: Motivation to Avoid Food Waste Scale (MAFW)
• Authors: Dorien Ribbers, Maggie Geuens, Mario Pandelaere, and Erica van Herpen (2023)
• Assessment Type: Self-report psychometric questionnaire
• Construct Architecture: Formative multidimensional macro-structure comprising four reflective first-order subscales
• Number of Items: 21 items
• Subscale Distribution:
  • Environmental Motivation Subscale
  • Moral Motivation Subscale
  • Financial Motivation Subscale
  • Social Motivation Subscale
• Response Scale: 7-point Likert scale (1 = Strongly Disagree, 2 = Disagree, 3 = Somewhat Disagree, 4 = Neither Agree nor Disagree, 5 = Somewhat Agree, 6 = Agree, 7 = Strongly Agree)
• Administration Time: Approximately 4 to 6 minutes
• Scoring Instructions:
  • Calculate separate mean or sum scores for each of the four subscales independently.
  • CRITICAL SCORING RULE: Do NOT sum or average all 21 items into a single global score. The scale is explicitly formative at the composite level; combining subscales obscures critical motivational differences and violates the scale’s empirical and theoretical architecture.
  • Higher scores on a specific subscale indicate stronger motivation within that respective psychological domain.

11. Permissions & Fee and Test Year

The Motivation to Avoid Food Waste Scale (MAFW) was published in 2023 in the peer-reviewed journal Global Environmental Change. The scale was established as a scientific research instrument to advance environmental psychology and consumer behavior scholarship.

Researchers and educators may utilize the scale for non-commercial academic research, pedagogical purposes, and public policy evaluation in accordance with standard fair-use scholarly conventions, provided full bibliographic attribution is granted to Ribbers et al. (2023). Commercial applications, including proprietary market research platforms, enterprise consulting audits, or commercial software integration, may require formal permissions or licensing from the copyright holders or Elsevier B.V. Inquiries regarding original item formulations and formal permissions should be directed to the corresponding authors via Wageningen University & Research or Ghent University.

12. References

• Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50(2), 179–211. https://doi.org/10.1016/0749-5978(91)90020-T
• 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
• 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
• Ribbers, D., Geuens, M., Pandelaere, M., & van Herpen, E. (2023). Development and validation of the motivation to avoid food waste scale. Global Environmental Change, 78, 102626. https://doi.org/10.1016/j.gloenvcha.2022.102626
• Stern, P. C. (2000). New environmental theories: Toward a coherent theory of environmentally significant behavior. Journal of Social Issues, 56(3), 407–424. https://doi.org/10.1111/0022-4537.00175
• van Geffen, L., van Herpen, E., & van Trijp, H. (2020). Household food waste—How to avoid it? An integrative review. In Food Waste Management (pp. 27–55). Palgrave Macmillan, Cham. https://doi.org/10.1007/978-3-030-20561-4_2

13. Items of the Scale