Social Distance Scale

1. Abstract

The Bogardus Social Distance Scale (BSDS) is a seminal psychometric instrument originally formulated by American sociologist Emory S. Bogardus in 1925. Designed to empirically quantify the degree of warmth, intimacy, indifference, or hostility that an individual or group maintains toward members of diverse social, racial, ethnic, religious, or stigmatized outgroups, the scale represents one of the earliest systematic operationalizations of cumulative behavioral intentions in sociology and social psychology. Structurally, the classical scale comprises seven hierarchical statements arranged along a continuum of increasing social distance—spanning intimate kinship through marriage to absolute exclusion from the respondent’s nation. The assessment functions principally as a cumulative, unidimensional Guttman scale, wherein endorsement of a highly intimate relational tier theoretically presupposes the acceptance of all preceding, less intimate relational tiers. Methodologically, respondents indicate their willingness to admit representative targets into designated social spheres using binary (yes/no) endorsements or modern Likert-type gradations. Across nearly a century of empirical deployment, the BSDS and its clinical and sociological adaptations—such as modified variants assessing psychiatric stigma, physical disabilities, sexual orientations, and socio-economic stratifications—have demonstrated robust psychometric utility. Psychometric evaluations routinely demonstrate exceptionally high internal consistency (Cronbach’s alpha often ranging between .88 and .96; high coefficients of reproducibility exceeding .90) and resilient test-retest reliability across diverse cultural contexts. Furthermore, non-parametric item response modeling, specifically Mokken scale analysis, corroborates the hierarchical invariant ordering of the manifest items. The scale continues to occupy a pivotal position in contemporary academic research examining prejudice reduction, implicit bias translation into overt social distance, interpersonal stigma dynamics, cross-temporal sociological trends, and intercultural relations.

2. Keywords

Social Distance Scale, Emory S. Bogardus, Guttman scaling, racial prejudice, ethnic distance, psychiatric stigma, intergroup relations, psychometrics, cumulative scaling, social psychology, outgroup derogation, structural equation modeling

3. Authors

The scale was developed by Emory Stephen Bogardus (1882–1973), an eminent American sociologist, founder of one of the earliest departments of sociology in the United States at the University of Southern California (USC) in 1915, and the longtime editor of Sociology and Social Research. Bogardus served as the 21st President of the American Sociological Association (ASA) in 1931. His foundational inquiries focused on immigration, assimilation, group attitudes, and social distance methodology. Subsequent major adaptations of the scale into psychiatric epidemiology and clinical psychology were spearheaded by researchers such as Bruce G. Link, Francis T. Cullen, Elmer L. Struening, and Patrick W. Corrigan, who operationalized social rejection toward individuals diagnosed with severe mental illnesses.

4. Purpose

The primary purpose of the Social Distance Scale is to provide an empirical, standardized, and quantifiable index of social distance—defined as the grades and degrees of understanding and feeling that persons entertain toward other persons or social collectivities. Bogardus conceptualized the tool not merely as an abstract attitudinal index, but as a direct proxy for manifest behavioral tendencies regarding interpersonal association, proximity, and structural inclusion. By evaluating the psychological boundaries individuals erect between their own ingroup and defined outgroups, the instrument sheds light on systemic social stratification, latent prejudice, and overt social hostility.

In academic and sociopolitical research, the scale is employed to track longitudinal shifts in intergroup attitudes across decades. Sociologists have replicated Bogardus’s national studies at regular intervals (notably in 1926, 1946, 1956, 1966, 1977, 1989, 2001, and 2010s), mapping macro-level alterations in racial integration, xenophobia, cultural assimilation, and national tolerance. These continuous implementations demonstrate the evolving hierarchies of social preference, documenting how historical events—such as wars, economic depressions, civil rights legislation, and globalization—modulate the boundaries of social acceptability.

In clinical psychology and psychiatric epidemiology, modified iterations of the BSDS are widely recognized as the gold standard for measuring public and personal stigma toward individuals experiencing psychiatric conditions, including schizophrenia, major depressive disorder, substance use disorders, and bipolar affective disorder. Clinicians and researchers use the scale to gauge public rejection, evaluate the efficacy of anti-stigma psychoeducational campaigns, and understand structural discrimination within healthcare systems. By isolating which tiers of social interaction (e.g., working alongside a peer versus having that peer marry a close relative) trigger heightened distress or rejection, interventions can be tailored to target specific dimensions of perceived threat and stigmatizing social behavior.

5. Psychological Construct

The construct of social distance represents the perceived or desired degree of separation between social groups or individuals. Far from reflecting a simple affective reaction, social distance encapsulates a complex interplay of cognitive stereotyping, affective prejudice, and discriminatory behavioral intentionality. The scale maps this construct along a structured hierarchy of increasing interpersonal intimacy. The theoretical construct posits that social relationships can be calibrated systematically across seven core relational strata:

• Primary Kinship (Marriage): Represents the ultimate threshold of social intimacy and personal acceptance. Admitting an outgroup member to close kinship by marriage requires the absolute suspension of categorical avoidance and reflects the highest state of egalitarian integration. Rejection at this level represents the most subtle, socially resilient form of prejudice.
• Intimate Peer Association (Personal Chums/Friends): Encompasses close personal friendship and informal, non-institutionalized companionship. Endorsement indicates personal comfort with shared confidences, reciprocal vulnerability, and private social engagements.
• Residential Proximity (Neighbors on the Same Street): Measures tolerance for spatial integration within immediate residential ecologies. This dimension taps into perceptions of neighborhood safety, residential property preservation, and willingness to share local resources.
• Secondary Institutional Proximity (Co-workers in Same Occupation): Evaluates functional acceptance within formal economic and occupational spheres. Working alongside an outgroup member entails structured professional contact where interpersonal intimacy is bounded by institutional norms.
• Civic Inclusion (Citizenship in One’s Country): Quantifies acceptance of legal, civic, and political equality. Endorsement signifies that the respondent recognizes the outgroup’s fundamental human and civil rights within the nation-state.
• Non-Civic Transience (Visitors Only): Represents a restrictive boundary condition wherein the outgroup member is tolerated exclusively as a temporary visitor or tourist, deliberately denying civic integration or residential legitimacy.
• Absolute Spatial Exclusion (Deportation or Banishment): Reflects total outgroup derogation, active xenophobia, or institutionalized segregation, wherein the respondent advocates for the complete physical exclusion of the group from the sovereign territory.

The scale assumes these relational levels operate along a monotonically increasing continuum of threat and vulnerability. Higher social distance signifies deeper social alienation, marked by affective coldness, stereotypic avoidance, and heightened perceptions of symbolic or realistic threat.

6. Theoretical Framework

The Bogardus Social Distance Scale is grounded in foundational sociological theories of intergroup conflict, symbolic interactionism, and social categorization. Emory S. Bogardus was heavily influenced by Robert E. Park and the Chicago School of Sociology, who conceptualized social distance as a spatial metaphor for understanding human ecology, social status, and cultural assimilation.

According to Park’s formulation, social distance reflects the reserve, inhibition, and spatial-psychological separation that prevents mutual understanding between different social classes, races, and cultures. Bogardus translated Park’s qualitative formulations into an operationalized measurement model. The foundational assumption rests upon the principle of cumulative unidimensionality, which later formed the direct empirical basis for Louis Guttman’s scalogram analysis in the 1940s. The theoretical premise states that human attitudes toward social boundaries are structured serially: an individual who accepts an outgroup member at the most intimate social tier (e.g., family member by marriage) will necessarily accept them at less demanding tiers (e.g., neighbor, co-worker, fellow citizen).

In modern social psychology, the instrument is interpreted through the lenses of Social Identity Theory (developed by Henri Tajfel and John Turner) and Realistic Group Conflict Theory. Social Identity Theory posits that individuals inherently categorize the social world into ingroups (‘us’) and outgroups (‘them’) to bolster self-esteem. Social distance serves as an active defense mechanism designed to preserve ingroup norms, boundaries, and status privileges. When outgroup members are perceived as violating ingroup standards or posing symbolic threats to cultural values, psychological distance expands, manifesting as systematic refusal to permit outgroup members into intimate social settings.

7. Validity

The validity of the Social Distance Scale has been empirically substantiated through nearly a century of psychometric evaluations across sociological, clinical, and cross-cultural research:

• Construct Validity: Construct validity is evidenced by the consistent replication of the scale’s cumulative property. Studies utilizing non-parametric Item Response Theory (Mokken scale analysis) consistently demonstrate that the seven relational items adhere to an invariant ordering of item difficulty across diverse demographic samples. When scaled against measures of explicit prejudice, modern ethnocentrism, and symbolic racism, the BSDS exhibits strong convergent correlations ($r = .55$ to $.78$).
• Criterion and Predictive Validity: The scale reliably predicts observable discriminatory actions, spatial segregation patterns, voting preferences on civil rights legislation, and spontaneous behavioral avoidance. In psychiatric research, Link et al. (1987, 1999) demonstrated that social distance scores directly predict community rejection, negative landlord rental decisions, and employer hiring discrimination against former psychiatric patients.
• Convergent Validity: High correlations are observed between social distance scores and validated psychometric batteries, including the Modern Racism Scale, the Right-Wing Authoritarianism (RWA) Scale, and the Social Dominance Orientation (SDO) Scale ($r = .48$ to $.65$, $p < .001$). Individuals demonstrating high authoritarian traits consistently register elevated social distance across multiple outgroups.
• Discriminant Validity: Research confirms that the BSDS effectively discriminates between general interpersonal anxiety or introversion and targeted outgroup avoidance. Discriminant validity coefficients with unrelated constructs, such as generalized self-efficacy or cognitive intelligence, remain uniformly low and statistically non-significant ($r < .12$).

8. Reliability

The Social Distance Scale exhibits excellent reliability coefficients across diverse operational formats and international cohorts:

• Internal Consistency: Although traditionally deployed as a Guttman-style cumulative scale rather than a tau-equivalent Likert composite, contemporary researchers frequently compute Cronbach’s alpha for multi-item and Likert-expanded variations. Reported alpha coefficients across sociological and psychiatric literature consistently range from $\alpha = .85$ to $.95$, indicating high homogeneity of the underlying social proximity construct.
• Guttman Coefficients: When evaluated via classical scalogram analysis, the scale routinely surpasses standard psychometric thresholds. The Coefficient of Reproducibility (CR)—which measures the degree to which a respondent’s exact pattern of responses can be predicted solely from their total score—consistently exceeds $.90$ (typically yielding values between $.92$ and $.96$). The Coefficient of Scalability (CS) routinely surpasses the accepted $.60$ benchmark, demonstrating that the observed scalability is not an artifact of extreme marginal frequencies.
• Test-Retest Reliability: Longitudinal stability assessments demonstrate high temporal reliability over short- to medium-term intervals. Bogardus (1933) and subsequent investigators reported test-retest correlation coefficients ranging from $r_{tt} = .82$ to $.91$ over intervals spanning two to eight weeks, confirming that structural social distance represents a stable attitudinal orientation rather than a transient emotional state.

9. Factor Analysis

Although the Bogardus Social Distance Scale was historically constructed under Guttman scalogram assumptions, modern psychometric validations have systematically assessed its latent dimensionality via Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).

Across numerous factor analytic investigations, the BSDS primarily displays a robust unidimensional structure. A single dominant general factor—labeled Permissible Social Closeness or Outgroup Rejection—frequently accounts for $65%$ to $80%$ of the total shared variance, with primary item factor loadings typically ranging between $.72$ and $.94$. In psychiatric adaptations of the scale, CFA models testing a single-factor solution typically demonstrate satisfactory to excellent fit indices:

• Comparative Fit Index (CFI) $ge .96$
• Tucker-Lewis Index (TLI) $ge .95$
• Root Mean Square Error of Approximation (RMSEA) $le .06$ ($90%$ CI $[.04, .08]$)
• Standardized Root Mean Square Residual (SRMR) $le .04$

In certain complex cross-cultural datasets, researchers have observed a bifactor or two-factor latent configuration. When a two-factor structure emerges, the items divide cleanly along interpersonal versus institutional domains: Factor 1: Intimate/Personal Relations (encompassing kinship by marriage, personal friendship, and immediate neighbor residential status) and Factor 2: Distal/Institutional Relations (encompassing occupational co-working, national citizenship, and exclusion from the country). Nonetheless, the high correlation between these latent factors ($r > .70$) affirms the theoretical and practical coherence of treating the instrument as a fundamentally unidimensional measure.

10. Instrument / Measurement Tool

The structural characteristics of the Bogardus Social Distance Scale are summarized below:

• Instrument Type: Standardized cumulative self-report questionnaire (Guttman scale or Likert-adapted scale).
• Target Demographics: Adolescents and adults across general, institutional, and clinical populations.
• Number of Items: 7 standardized hierarchical items (evaluated per designated target group).
• Response Formats:
  • Classical Format: Dichotomous endorsement (Yes = 1, No = 0 / Willing = 1, Unwilling = 0).
  • Modern Likert Format: 4-point, 5-point, or 7-point Likert ratings ranging from 1 (Definitely willing / Strong acceptance) to 5 or 7 (Definitely unwilling / Complete rejection).
• Scoring Models:
  • Racial Distance Index (RDI) / Classical Guttman Score: Calculated as the rank value (1 to 7) of the closest, most intimate relationship endorsed by the respondent. If a respondent endorses marriage (Item 1), their distance score is 1. If the closest relationship they allow is citizenship (Item 5), their score is 5. If they exclude the group entirely (Item 7), their score is 7.
  • Social Distance Differential (Composite Summation): In modern Likert iterations, responses are summed across the items (with reverse coding where necessary) to produce an aggregate social distance score ranging from 7 (minimal distance / maximum tolerance) to 35 or 49 (maximal distance / profound hostility).
• Administration Time: Approximately 3 to 5 minutes per target group assessed.

11. Permissions & Fee and Test Year

The classical Bogardus Social Distance Scale was initially developed and published by Emory S. Bogardus in 1925, with major structural updates published in 1933 and 1967. Because its original publication predates 1928, the classical Bogardus Social Distance Scale belongs in the public domain under United States copyright law. It is freely accessible to the global academic and scientific community without royalty obligations, licensing fees, or prior formal permissions.

Researchers may reproduce, adapt, translate, and deploy the classical instrument for academic, non-commercial, and clinical investigations. However, clinical researchers utilizing proprietary, copyrighted modern derivative instruments—such as specific psychiatric adaptations distributed within standardized stigma batteries or proprietary survey software—must consult the relevant contemporary authors, publishers, or licensing bodies prior to institutional deployment.

12. References

• Bogardus, E. S. (1925). Measuring social distances. Journal of Applied Sociology, 9, 299–308.
• Bogardus, E. S. (1928). Immigration and race attitudes. D. C. Heath and Company.
• Bogardus, E. S. (1933). A social distance scale. Sociology and Social Research, 17, 265–271.
• Bogardus, E. S. (1947). Measurement of personal-group relations. Sociometry, 10(4), 306–311. https://doi.org/10.2307/2785570
• Bogardus, E. S. (1967). A forty year racial distance study. University of Southern California Press.
• Guttman, L. (1944). A basis for scaling qualitative data. American Sociological Review, 9(2), 139–150. https://doi.org/10.2307/2086306
• Link, B. G., Cullen, F. T., Frank, J., & Wozniak, J. F. (1987). The social rejection of former mental patients: Understanding why labels matter. American Journal of Sociology, 92(6), 1461–1500. https://doi.org/10.1086/228672
• Link, B. G., Phelan, J. C., Bresnahan, M., Stueve, A., & Pescosolido, B. A. (1999). Public conceptions of mental illness: Labels, causes, dangerousness, and social distance. American Journal of Public Health, 89(9), 1328–1333. https://doi.org/10.2105/AJPH.89.9.1328
• Parrillo, V. N., & Donoghue, C. (2005). Updating the Bogardus social distance studies: A new national survey. The Social Science Journal, 42(2), 257–271. https://doi.org/10.1016/j.soscij.2005.03.011
• Parrillo, V. N., & Donoghue, C. (2013). The decreasing significance of religion: College students’ social distance toward religious out-groups. Sociological Forum, 28(4), 841–862. https://doi.org/10.1111/socf.12059
• Wark, C., & Galliher, J. F. (2007). Emory Bogardus and the origins of the social distance scale. The American Sociologist, 38(4), 383–395. https://doi.org/10.1007/s12108-007-9023-9

13. Items of the Scale