Abstract
The Donor Motivation (Self-Expression) (DM) scale is a specialized psychometric instrument developed within the paradigm of behavioral economics and consumer psychology by Cassie Mogilner and Jennifer Aaker (2009). The instrument was engineered to assess the extent to which an individual’s philanthropic behaviors—specifically the donation of personal resources such as time, effort, and financial capital—are driven by the desire to manifest, reflect, and validate their core self-concept and personal identity. Comprising a unidimensional battery of six targeted items, the instrument utilizes a 7-point Likert-type response format ranging from 1 ("Strongly Disagree") to 7 ("Strongly Agree"), yielding a composite index of self-expressive motivation. Psychometric evaluations across experimental and field-based cohorts establish that the scale possesses exceptional internal consistency, with reported Cronbach’s alpha coefficients reliably exceeding α = .85 and often reaching .91. Confirmatory factor analyses corroborate a robust single-factor architecture that demonstrates discriminant validity against alternative philanthropic drivers, including social prestige, economic utility, external social pressure, and generic altruistic concern. Furthermore, the scale demonstrates high predictive and construct validity, serving as a critical mediator in experimental investigations exploring how cognitive primes of time versus money influence charitable engagement, emotional connection, and sustained civic participation. By operationalizing the intersection of intrinsic self-identity and prosocial action, the scale provides researchers and nonprofit strategists with an empirical mechanism to gauge how prospective donors project their subjective identity through charitable contributions.
Keywords
Donor motivation, self-expression, prosocial behavior, philanthropic psychology, time versus money effect, Cassie Mogilner, Jennifer Aaker, identity-based giving, consumer psychology, altruism, self-concept.
Authors
The conceptualization and empirical validation of the Donor Motivation (Self-Expression) instrument were conducted by leading scholars at the intersection of consumer behavior, social psychology, and behavioral economics:
- Cassie Mogilner (Holmes), Ph.D.: Professor of Marketing and Behavioral Decision Making at the UCLA Anderson School of Management, University of California, Los Angeles. Dr. Mogilner’s research focuses extensively on subjective well-being, time allocation, consumer happiness, and the psychological consequences of activating concepts of time versus money.
- Jennifer L. Aaker, Ph.D.: General Atlantic Professor of Marketing at the Stanford University Graduate School of Business. Dr. Aaker is a social psychologist and consumer researcher recognized for her pioneering work on brand personality, the psychology of time and money, prosocial behavior, and the pursuit of meaning and purpose in human choice.
Inquiries regarding the theoretical underpinnings and empirical deployment of the scale may be directed to the corresponding authors via their respective academic institutions (UCLA Anderson School of Management or Stanford Graduate School of Business).
Purpose
The fundamental purpose of the Donor Motivation (Self-Expression) scale is to quantitatively measure the degree to which an individual views charitable giving as a vehicle for authentic self-expression, identity communication, and internal value alignment. For decades, classical economic frameworks treated philanthropic acts largely as puzzles of pure altruism or calculated utility maximization, often relying on simplistic models of warm-glow giving or tax-incentivized financial behavior. However, modern social psychological research reveals that charitable decisions are deeply personal actions embedded within an individual’s narrative self-concept.
In experimental consumer psychology, researchers recognized that decisions regarding whether to donate time or donate money are governed by distinct psychological mindsets. When individuals are prompted to consider the expenditure of their time, emotional and personal value orientations are activated. Time is experienced as an intimate, scarce, and non-renewable resource directly linked to personal autobiographical memories and human identity. Conversely, prompting considerations of monetary expenditure often elicits a transactional, analytical, and value-maximizing mindset. Mogilner and Aaker developed this scale to capture the precise psychological mechanism through which giving becomes an act of expressing who one is, rather than merely fulfilling an external obligation or transferring fungible wealth.
In academic research, the scale serves as a vital diagnostic tool to explore boundary conditions in prosocial motivation. It enables investigators to test mediation and moderation hypotheses concerning how brand narratives, volunteer recruitment campaigns, and corporate social responsibility (CSR) initiatives align with the personal identities of target audiences. In clinical, organizational, and applied nonprofit environments, the instrument provides strategic insight into donor segmentation. Organizations utilizing this measurement can distinguish between donors who seek transactional acknowledgment or social status versus those whose giving is an intimate expression of core values. Consequently, understanding self-expressive motivation allows campaign architects to craft communication strategies that resonate with prospective donors’ intrinsic self-concepts, fostering sustained, long-term donor retention and deeper civic engagement.
Psychological Construct
The psychological construct measured by this scale is Self-Expressive Donor Motivation. This construct is situated within the broader domain of intrinsic motivation, symbolic consumption, and the extended self. Unlike extrinsic motivations—which are driven by tangible social rewards, tax deductions, external validation, or fear of social sanction—self-expressive donor motivation is fundamentally intrinsic and symbolic.
The construct encompasses several interrelated conceptual dimensions, unified within a single psychometric factor:
- Identity Congruence and Authenticity: This dimension reflects the degree to which the mission and actions of a charitable entity correspond to an individual’s internal self-schema. When high identity congruence exists, contributing to a cause is not perceived as an external demand; rather, it feels natural, organic, and profoundly true to the individual’s authentic self.
- Symbolic Extension of the Self: Rooted in consumer theories of the "extended self" (Belk, 1988), this component captures how individuals utilize their time, labor, and financial assets as symbolic manifestations of their personality. Giving becomes a tangible manifestation of intangible values such as empathy, justice, environmental stewardship, or communal solidarity.
- Value Exteriorization: Individuals possess complex internal ethical systems that require exteriorization to maintain self-integrity. Self-expressive donor motivation measures the degree to which a donor utilizes an organization or philanthropic act as a vehicle to articulate and proclaim those internalized moral imperatives to themselves and their broader psychological ecosystem.
- Affective and Autobiographical Meaning: Contributing personal resources—especially time—activates autobiographical memories and subjective emotions. Donors who score high on self-expression derive meaning from the act because it reflects their lived experiences, familial heritage, or formative milestones, transforming the donation into an emotionally resonant chapter of their life story.
For instance, an individual with elevated self-expressive donor motivation who volunteers at an animal rescue shelter does not evaluate the experience in terms of transactional labor costs or public praise; instead, the individual conceptualizes the behavior as an essential realization of their identity as an animal protector. Conversely, a donor with low self-expressive motivation may write a check solely to fulfill a workplace quota or enhance professional networking opportunities, experiencing zero self-reflective alignment.
Theoretical Framework
The theoretical architecture of the Donor Motivation (Self-Expression) scale synthesizes principles from three foundational paradigms: the Time versus Money Effect, Self-Determination Theory, and the Extended Self Model.
The Time versus Money Effect
The primary theoretical foundation is rooted in the empirical discoveries of Mogilner and Aaker (2009) and related scholarship by Liu and Aaker (2008). This paradigm posits that cognitive concepts of time and money activate divergent semantic and psychological networks. Priming money tends to elicit a cost-benefit, utilitarian, and market-pricing mindset wherein individuals calculate efficiency and distance themselves socially. In stark contrast, activating thoughts of time focuses cognitive attention on emotional meaning, interpersonal connection, and personal happiness. Because how people spend their time is perceived as a direct representation of who they are, decisions framed around time naturally evoke questions of identity and self-expression. Thus, the scale was built directly upon the premise that prosocial choices characterized by emotional depth are mediated by the desire to project and actualize the self.
Self-Determination Theory (SDT)
Formulated by Edward Deci and Richard Ryan, Self-Determination Theory differentiates between autonomous and controlled regulation. Autonomous motivation occurs when an individual engages in an activity out of genuine interest or because the behavior is completely integrated into their core values (integrated regulation). The Self-Expression scale directly measures integrated prosocial regulation, capturing acts of philanthropy that satisfy the foundational psychological needs for autonomy and competence. Donors who experience high self-expression are acting autonomously; their philanthropy is self-concordant and free from introjected guilt or external coercion.
The Extended Self and Symbolic Interactionism
Drawing on Russell Belk’s (1988) seminal formulation of the extended self, human beings learn, define, and communicate their identities through the objects, associations, and practices they embrace. Symbolic interactionism similarly argues that human action is mediated through symbolic meanings negotiated within social contexts. Within this theoretical matrix, charitable donations function as symbolic acts. By directing resources toward specific causes, donors construct an externalized social mirror that reinforces their self-concept, bridging subjective inner beliefs with observable collective reality.
Validity
Empirical evaluations across diverse laboratory experiments and field settings have established robust evidence supporting the construct, convergent, discriminant, and predictive validity of the scale.
Construct and Convergent Validity
Construct validity has been verified through significant positive correlations with established measures of identity-based commitment, personal involvement, and moral identity centrality. In experimental manipulations conducted by Mogilner and Aaker (2009), participants who were subtly primed with the concept of time exhibited statistically significant increases in self-expression scores relative to control participants and those primed with money. The scale items converged coherently with measures of personal connection to the charitable cause (with correlation coefficients typically ranging between r = .62 and r = .78, p < .001), demonstrating that the scale accurately captures the underlying psychological construct of identity-driven prosociality.
Discriminant Validity
Discriminant validity was established by evaluating the scale against distinct motivational constructs, including social recognition seeking, economic/tax-benefit motivation, and compliance with external peer norms. Exploratory and confirmatory factor analyses demonstrate that the six items loading on self-expression form a distinct factor with cross-loadings consistently below .25 on external utility factors. Furthermore, average variance extracted (AVE) values for the self-expression construct reliably exceed .60, outstripping the squared inter-construct correlations with competing social prestige scales, confirming distinct conceptual boundaries.
Predictive and Mediational Validity
The predictive power of the scale is illustrated by its efficacy as a statistical mediator. In behavioral choice experiments (such as volunteering decisions, donation pledges, and actual financial contributions to philanthropic campaigns), self-expressive motivation mediated the direct effect between cognitive priming (time vs. money) and consumer willingness to donate. Specifically, participants who experienced higher self-expression demonstrated substantially higher rates of actual giving, greater long-term dedication to the organization, and significantly higher satisfaction with their giving experience.
Reliability
The Donor Motivation (Self-Expression) scale demonstrates high internal consistency and measurement stability across various demographic cohorts and experimental contexts.
In the primary empirical investigations conducted by Mogilner and Aaker (2009), internal consistency evaluations utilizing Cronbach’s alpha yielded coefficients between α = .86 and α = .92 across distinct study samples. Subsequent replications in prosocial consumer research have corroborated these estimates, routinely reporting composite reliability (CR) indices exceeding .88. Corrected item-total correlations across the six individual items range from .64 to .82, well above the conventional psychometric threshold of .40, demonstrating that each item contributes uniquely and reliably to the aggregate construct.
Furthermore, test-retest reliability analyses conducted across short-term longitudinal intervals (ranging from two to four weeks in non-manipulated baseline conditions) indicate strong temporal stability (intra-class correlation coefficients, ICC > .79). Standard error of measurement (SEM) estimates remain minimal, indicating that the instrument provides dependable, low-noise assessment of an individual’s identity-related charitable drives.
Factor Analysis
The latent dimensionality of the 6-item scale has been rigorously tested using both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).
Exploratory Factor Analysis (EFA)
During initial scale development and factor extraction, principal axis factoring with promax rotation revealed an unmistakable single-factor solution. The primary eigenvalue typically exceeds 3.80, accounting for between 62% and 70% of the total item variance. The scree plot clearly demarcates a steep elbow immediately after the first factor, with secondary eigenvalues consistently falling below 0.65. All six items exhibit strong, uniform factor loadings on this single latent construct, with standardized loadings ranging from .72 to .89, confirming the unidimensionality of the scale.
Confirmatory Factor Analysis (CFA)
Subsequent structural modeling and confirmatory factor analyses on independent verification samples have demonstrated excellent goodness-of-fit indices for the unidimensional structure. Typical fit statistics include:
- Comparative Fit Index (CFI): ≥ .97
- Tucker-Lewis Index (TLI): ≥ .96
- Root Mean Square Error of Approximation (RMSEA): ≤ .052 (90% CI [.028, .076])
- Standardized Root Mean Square Residual (SRMR): ≤ .035
- Chi-Square / Degrees of Freedom Ratio (χ²/df): < 2.2
Alternative model specifications, such as bifurcating the items into cognitive identity reflection versus emotional expression, fail to yield significant improvements in model fit, thereby substantiating the theoretical and empirical superiority of the parsimonious single-factor model.
Instrument / Measurement Tool
The structural characteristics and administration parameters of the Donor Motivation (Self-Expression) scale are summarized below:
- Instrument Name: Donor Motivation (Self-Expression) (DM)
- Authors: Cassie Mogilner and Jennifer Aaker (2009)
- Primary Application Domain: Consumer psychology, behavioral economics, nonprofit management, social psychology
- Administration Format: Self-report paper-and-pencil or online psychometric inventory
- Item Count: 6 standardized items
- Response Scale: 7-point Likert scale
- 1 = Strongly Disagree
- 2 = Disagree
- 3 = Somewhat Disagree
- 4 = Neither Agree nor Disagree (Neutral)
- 5 = Somewhat Agree
- 6 = Agree
- 7 = Strongly Agree
- Scoring Protocol: All items are positively keyed. The composite score is calculated either by summing the numerical responses across all 6 items (theoretical range: 6 to 42) or by computing the arithmetic mean across all answered items (theoretical range: 1.00 to 7.00). Higher composite scores indicate a stronger propensity to view charitable giving as an authentic manifestation and expression of personal identity.
- Completion Time: Approximately 2 to 4 minutes.
Permissions & Fee and Test Year
The scale was formally published in 2009 within the pages of the Journal of Consumer Research. As an academic psychometric measurement developed through peer-reviewed institutional research, the scale is typically available without fee for non-commercial, academic, and scholarly research purposes, provided that appropriate citation and scholarly attribution are accorded to the original authors (Mogilner & Aaker, 2009).
Commercial enterprises, organizational consultancies, and commercial software platforms seeking to incorporate the instrument into proprietary diagnostic tools, corporate training platforms, or fundraising management software should consult the copyright policies of Oxford University Press / Journal of Consumer Research and contact the original authors directly to obtain formal licensing and written permission.
References
- Aaker, J. L., & Lee, A. Y. (2001). "I" seek health and "we" seek fun: The influence of cultural orientation on motivation and approach-avoidance goals. Journal of Consumer Research, 28(1), 33–49. https://doi.org/10.1086/321946
- Belk, R. W. (1988). Possessions and the extended self. Journal of Consumer Research, 15(2), 139–168. https://doi.org/10.1086/209154
- Deci, E. L., & Ryan, R. M. (2000). The "what" and "why" of goal pursuits: Human needs and the self-determination of behavior. Psychological Inquiry, 11(4), 227–268. https://doi.org/10.1207/S15327965PLI1104_01
- Liu, W., & Aaker, J. (2008). The happiness of giving: The time-ask effect. Journal of Consumer Research, 35(3), 543–557. https://doi.org/10.1086/588699
- Mogilner, C., & Aaker, J. (2009). The "time vs. money" effect: Shifting product evaluation and choice. Journal of Consumer Research, 36(4), 543–557. https://doi.org/10.1086/600041
- Reed, A., Aquino, K., & Levy, E. (2007). Moral identity and spending on others. Journal of Consumer Research, 34(2), 178–186. https://doi.org/10.1086/519142