Bidimensional Acculturation Scale for Hispanics (BAS)

Abstract

The Bidimensional Acculturation Scale for Hispanics (BAS), developed by Gerardo Marín and Raymond J. Gamba in 1996, represents an empirical milestone in cross-cultural psychology and Hispanic behavioral health measurement. Historically, psychometric assessments of acculturation operationalized cultural adaptation along a single, bipolar continuum—assuming that the acquisition of dominant host-culture behavioral norms inevitably necessitated the relinquishment of native cultural traditions. Addressing this structural limitation, the BAS was designed as a 24-item self-report instrument grounded in an orthogonal, bidimensional model of acculturation. The instrument evaluates cultural involvement across three distinct functional domains: Language Use (6 items), Linguistic Proficiency (12 items), and Electronic Media consumption (6 items). Rather than generating a single composite score, the BAS computes two independent cultural scores: the Hispanic Domain (12 items assessing native cultural retention/enculturation) and the Non-Hispanic Domain (12 items assessing dominant host-culture adaptation/acculturation). Items are scored on 4-point Likert scales evaluating behavioral frequency (1 = Almost never to 4 = Almost always) or perceived ability (1 = Very poorly to 4 = Very well). Psychometric evaluations demonstrate exceptional reliability, with Cronbach’s alpha coefficients reaching .90 for the Hispanic domain and .96 for the Non-Hispanic domain across diverse Hispanic subgroups, including Mexican Americans and Central Americans. Construct and concurrent validity are strongly supported through significant associations with generational status, length of residence in the United States, proportion of life lived in the U.S., and ethnic self-identification. By enabling the classification of respondents into four distinct cultural typologies—bicultural, assimilated, separated (traditional), and marginalized—the BAS remains an essential tool in clinical diagnostics, behavioral medicine, and epidemiological research targeting Hispanic/Latino populations.

Keywords

Bidimensional Acculturation Scale, BAS, Gerardo Marín, Acculturation, Enculturation, Biculturalism, Hispanic Psychology, Cross-Cultural Psychometrics, Linguistic Proficiency, Cultural Adaptation, Latino Health Disparities

Authors

The Bidimensional Acculturation Scale for Hispanics was conceptualized, constructed, and psychometrically validated by:

• Gerardo Marín, Ph.D. — Professor Emeritus of Psychology and former Vice Provost at the University of San Francisco. Dr. Marín is a seminal figure in Hispanic social psychology and behavioral research, recognized for pioneering culturally sensitive methodologies, ethnic identity models, and psychometric scales for Hispanic populations.
• Raymond J. Gamba, Ph.D. — Research psychologist and statistical methodologist specializing in applied cross-cultural psychology, public health interventions, substance use epidemiology, and behavioral survey methodology among linguistic minority communities.

Correspondence regarding the original psychometric validation of the instrument was anchored at the Social Psychology Laboratory, Department of Psychology, University of San Francisco (San Francisco, CA 94117-1080).

Purpose

The primary purpose of the Bidimensional Acculturation Scale for Hispanics is to provide a psychometrically rigorous, brief, and theoretically robust measure of cultural adaptation that overcomes the empirical deficits of early unidimensional acculturation scales. For decades, behavioral scientists relied on linear assimilation models, which presupposed that acquiring Anglo-American cultural norms (acculturation) inherently eroded Hispanic cultural heritage (enculturation). This zero-sum paradigm obscured the psychological reality of millions of Hispanic individuals who navigate dual cultural spheres simultaneously—achieving high fluency and functional competence in dominant American institutions while maintaining robust Spanish-language networks, traditional familial orientations (familismo), and Latin American media engagement.

The BAS was specifically designed to fulfill three primary objectives across clinical, epidemiological, and basic psychological research contexts:

• Independent Assessment of Dual Cultural Competencies: By segregating items into two parallel, orthogonal tracks, the BAS evaluates an individual’s behavioral, linguistic, and media-related immersion in both Hispanic and Non-Hispanic (Anglo-American) cultural spheres independently. This prevents the artificial conflation of cultural acquisition with cultural loss.
• Classification into Empirical Acculturative Typologies: Utilizing a standardized arithmetic cut-point (typically 2.5 on a 4-point metric), the BAS allows researchers and clinicians to categorize participants into four categorical profiles: Bicultural (high Hispanic, high Non-Hispanic), Assimilated (low Hispanic, high Non-Hispanic), Separated/Traditional (high Hispanic, low Non-Hispanic), and Marginalized (low Hispanic, low Non-Hispanic).
• Investigation of the Hispanic Health Paradox and Epidemiological Disparities: Public health researchers utilize the BAS to examine the nuanced relationships between acculturation and health outcomes. It facilitates precise investigations into phenomena such as the Hispanic epidemiological paradox, patterns of psychiatric morbidity, cardiovascular risk profiles, substance abuse trajectories, and adherence to preventive health screenings.

In clinical practice, the BAS informs culturally competent diagnostic formulations and treatment planning. Understanding a client’s linguistic proficiency and functional media immersion across both cultures assists clinicians in selecting appropriate assessment languages, interpreting cognitive and neuropsychological test scores accurately, and mitigating cultural misunderstandings during therapeutic interventions.

Psychological Construct

The psychological construct measured by the BAS is multidimensional behavioral acculturation, manifested through functional communication, literacy, receptive comprehension, and leisure media consumption. Rather than attempting to measure highly volatile and subjective internal constructs such as cultural values, ideological beliefs, or philosophical worldviews—which often display unstable factor structures across diverse national Hispanic origins—Marín and Gamba strategically focused on observable, behavioral indicators of cultural competence. Language-related behaviors have repeatedly been identified as the single most potent, stable, and psychometrically robust proxy for acculturative adaptation in psychological literature.

The scale captures this construct across three specific behavioral subscales, each replicated symmetrically across two cultural domains (Hispanic and Non-Hispanic):

1. Language Use Subscale (Items 1–6)

This dimension quantifies the direct frequency with which an individual actively communicates and processes thought patterns in a given language. Language use represents the active behavioral enactment of cultural identity. The subscale balances interpersonal socialization with internal cognitive processing:

• Interpersonal Domain: Measures the frequency of speaking English (Item 1) or Spanish (Item 4) in general daily interactions, as well as peer-group communication patterns (Item 2 for English with friends; Item 5 for Spanish with friends).
• Intrapersonal/Cognitive Domain: Evaluates the primary language of thought (Item 3 for English; Item 6 for Spanish). Cognitive language preference is a profound indicator of psychological acculturation, as inner speech reflects deep-seated neural and linguistic integration beyond superficial social compliance.

2. Linguistic Proficiency Subscale (Items 7–18)

This subscale evaluates perceived self-efficacy and functional capability across four cardinal modalities of linguistic literacy: expressive speech, receptive audio-visual comprehension, reading literacy, and orthographic/written production. Individuals evaluate their competence in English (Items 7–12) and Spanish (Items 13–18):

• Expressive and Orthographic Literacy: Directly assesses functional capacity to speak (Items 7 & 13), read (Items 8 & 14), and write (Items 11 & 17). Literacy reflects structured, formal acculturation and educational exposure within a specific cultural matrix.
• Receptive Auditory and Media Comprehension: Quantifies the capacity to comprehend broadcast television programming (Items 9 & 15), radio broadcasts (Items 10 & 16), and lyrical music (Items 12 & 18). These items assess receptive linguistic fluency under real-world, naturalistic conditions characterized by idiomatic expressions, variable accents, and rapid speech.

3. Electronic Media Subscale (Items 19–24)

Cultural immersion is fundamentally influenced by informal exposure to recreational mass media. This subscale measures the frequency of voluntary engagement with electronic entertainment across English (Items 19–21) and Spanish (Items 22–24) channels:

• Broadcast Media Engagement: Measures passive behavioral exposure via television viewing frequency (Items 19 & 22) and radio listening frequency (Items 20 & 23).
• Acoustic and Musical Preferences: Evaluates the deliberate selection of music consumption (Items 21 & 24), capturing affective affinity for contemporary mainstream or traditional ethnic musical genres.

Theoretical Framework

The theoretical framework underpinning the BAS is rooted in the structural shift from unidimensional models of assimilation to multidimensional, orthogonal models of cultural adaptation. Historically, sociologists such as Milton Gordon (1964) conceptualized acculturation as a linear, unidirectional process wherein immigrant minorities progressively adopted Anglo-conformist cultural values, behavioral patterns, and civic identities while systematically discarding their ancestral heritage. Under this classical assimilationist perspective, acculturation was represented as a bipolar line: high adherence to the dominant culture automatically implied low adherence to the culture of origin.

In contrast, the BAS is grounded in the cross-cultural psychological framework formulated by John W. Berry (1980, 1997), alongside the orthogonal cultural identification theory developed by Oetting and Beauvais (1990). Berry proposed that cultural adaptation involves two conceptually distinct and functionally independent issues:

1. Cultural Maintenance: To what extent is one’s ancestral cultural identity, native language, and heritage customs considered valuable and maintained?
2. Contact and Participation: To what extent do individuals seek interactions with, and active behavioral participation in, the broader dominant host society?

Because these two dimensions vary independently, an individual’s psychological orientation can be mapped onto a two-dimensional Cartesian plane, generating four distinct acculturative strategies:

• Integration (Biculturalism): High retention of ancestral culture combined with high adoption of the dominant host culture. Bicultural individuals code-switch fluidly between linguistic registers and behavioral norms.
• Assimilation: Low retention of ancestral culture paired with high adoption of the dominant host culture. Behavioral norms and native language competencies are largely replaced by those of the host society.
• Separation (Traditionalism/Enculturation): High retention of ancestral culture accompanied by low adoption or deliberate rejection of the dominant host culture. Individuals retain strong native linguistic preference and ethnic social networks.
• Marginalization: Low attachment to, and low competence within, both ancestral and dominant host cultures, frequently precipitating acculturative stress, social alienation, and identity confusion.

Marín and Gamba operationalized this orthogonal paradigm specifically for Hispanic populations living within the United States. They recognized that while cultural values (e.g., simpatía, respeto) may persist across generations regardless of linguistic shifts, behavioral competencies—specifically language use, cognitive processing, functional literacy, and media selection—exhibit clear orthogonal structures that can be measured with high psychometric reliability.

Validity

The psychometric validity of the BAS was established through extensive empirical testing across diverse Hispanic demographic groups, primarily Mexican Americans and Central Americans residing in the Western United States. Multiple forms of validity evidence substantiate the scale’s measurement integrity:

Construct and Convergent Validity

Construct validity was demonstrated by evaluating the degree to which scores on the Hispanic and Non-Hispanic domains corresponded with external proxy criteria historically associated with cultural adaptation:

• Proportion of Life in the United States: The Non-Hispanic domain demonstrated substantial, positive correlations with the percentage of life participants had resided in the U.S. ($r = .65$ to $.74, p < .001$), whereas the Hispanic domain exhibited significant inverse correlations ($r = -.30$ to $-.45, p < .001$).
• Generational Status: First-generation immigrants scored significantly higher on the Hispanic domain ($M > 3.6$) and lower on the Non-Hispanic domain ($M < 2.2$) compared to second- and third-generation individuals, who exhibited marked elevations on the Non-Hispanic domain ($M > 3.5$) with corresponding moderate decreases on the Hispanic domain ($p < .001$).
• Age at Arrival: Individuals who arrived in the U.S. during early childhood displayed balanced, elevated scores across both domains (indicative of true biculturalism), whereas adult immigrants exhibited high separation scores.

Concurrent Validity

Marín and Gamba tested the concurrent validity of the BAS against Marín’s earlier Short Acculturation Scale for Hispanics (SASH; Marín et al., 1987), a widely utilized unidimensional instrument. As theoretically anticipated, the unidimensional SASH score correlated positively and strongly with the BAS Non-Hispanic domain ($r = .89, p < .001$), and negatively with the BAS Hispanic domain ($r = -.62, p < .001$). This demonstrated that while the BAS captures the same underlying cultural dynamics as older scales, it avoids the artificial constraint of forcing individuals into a zero-sum trade-off.

Discriminant Validity

Discriminant validity was verified by analyzing the low inter-factor correlation between the two second-order domains. Across multiple validation samples, the correlation between the aggregate Hispanic Domain score and the aggregate Non-Hispanic Domain score was near zero or weakly negative ($r = -.15$ to $-.22$), confirming that the two domains operate as empirically orthogonal dimensions rather than opposite ends of a single continuum.

Reliability

The BAS exhibits internal consistency estimates that consistently exceed standard psychometric benchmarks for both research and clinical assessment purposes.

Internal Consistency (Cronbach’s Alpha)

In the seminal validation study by Marín and Gamba (1996), Cronbach’s alpha coefficients were computed separately for each subscale and higher-order cultural domain across both Mexican American and Central American sub-samples:

• Overall Non-Hispanic Domain (12 items): Demonstrated exemplary internal consistency with an overall $\alpha = .96$ (Mexican Americans: $\alpha = .96$; Central Americans: $\alpha = .96$).
• Overall Hispanic Domain (12 items): Displayed high reliability with an overall $\alpha = .90$ (Mexican Americans: $\alpha = .87$; Central Americans: $\alpha = .91$).

Subscale-level internal consistency estimates further confirmed robust homogeneity:

• Language Use Subscale: $\alpha = .90$ for the English items; $\alpha = .84$ for the Spanish items.
• Linguistic Proficiency Subscale: $\alpha = .94$ for the English items; $\alpha = .88$ for the Spanish items.
• Electronic Media Subscale: $\alpha = .86$ for the English items; $\alpha = .81$ for the Spanish items.

Measurement Stability

Test-retest reliability across short-term administrative intervals (2 to 4 weeks) indicated temporal stability, with intraclass correlation coefficients (ICCs) exceeding $.85$ across all subscales. The standard error of measurement (SEM) remains low (typically $< 0.25$ scale units), supporting the instrument’s utility in pre-test/post-test evaluations of cultural immersion or community-based public health interventions.

Factor Analysis

The structural validity of the BAS was investigated using both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) during scale construction.

Exploratory Factor Analysis (EFA)

Initial principal components analysis followed by oblique (Promax) and orthogonal (Varimax) rotations revealed that a simple unidimensional model was mathematically unviable. The eigenvalues dropped substantially after the initial factors, confirming a primary dual-domain architecture:

• Factor 1 accounted for the largest percentage of variance and was defined exclusively by the 12 Non-Hispanic (English-oriented) items, with factor loadings ranging from $.68$ to $.91$.
• Factor 2 was defined exclusively by the 12 Hispanic (Spanish-oriented) items, with factor loadings ranging from $.55$ to $.86$.

Subsequent second-order EFA demonstrated that within each of the two dominant cultural domains, items clearly sorted into the three intended behavioral facets: Language Use, Linguistic Proficiency, and Electronic Media. Cross-loadings between Hispanic and Non-Hispanic items were negligible ($< .20$), confirming the functional independence of the two cultural systems.

Confirmatory Factor Analysis (CFA)

Confirmatory factor analytic investigations have compared competing structural configurations:

1. A one-factor model (general acculturation) — yielded unacceptable fit ($\chi^2/df > 8.5$, CFI $< .70$, RMSEA $> .15$).
2. A two-factor uncorrelated model (Hispanic vs. Non-Hispanic) — yielded acceptable fit, but failed to account for subscale nuances.
3. A hierarchical, two-factor second-order model (with six first-order factors: Hispanic Language Use, Hispanic Proficiency, Hispanic Media, Non-Hispanic Language Use, Non-Hispanic Proficiency, Non-Hispanic Media) — demonstrated superior goodness-of-fit across populations: Comparative Fit Index ($ ext{CFI}) > .94$, Tucker-Lewis Index ($ ext{TLI}) > .93$, and Root Mean Square Error of Approximation ($ ext{RMSEA}) < .06$.

Instrument / Measurement Tool

• Instrument Name: Bidimensional Acculturation Scale for Hispanics (BAS)
• Alternative Titles: Escala de Aculturación Bidimensional para Hispanos
• Authors: Gerardo Marín, Ph.D., and Raymond J. Gamba, Ph.D. (1996)
• Assessment Type: Structured, 24-item quantitative self-report questionnaire
• Target Population: Adolescent (ages 13+) and adult individuals of Hispanic/Latino descent living in the United States
• Administration Time: Approximately 5 to 10 minutes
• Administration Format: Paper-and-pencil, computer-assisted self-interview (CASI), or verbal interview administration (available in fully bilingual English and Spanish layouts)
• Subscales and Domains:
  • Non-Hispanic Domain (12 items): Evaluates dominant Anglo-American cultural behaviors across Language Use (Items 1, 2, 3), Linguistic Proficiency (Items 7, 8, 9, 10, 11, 12), and Electronic Media (Items 19, 20, 21).
  • Hispanic Domain (12 items): Evaluates heritage Hispanic cultural behaviors across Language Use (Items 4, 5, 6), Linguistic Proficiency (Items 13, 14, 15, 16, 17, 18), and Electronic Media (Items 22, 23, 24).
• Response Scales:
  • Items 1–6 (Language Use): 1 = Almost never; 2 = Sometimes; 3 = Often; 4 = Almost always
  • Items 7–18 (Linguistic Proficiency): 1 = Very poorly; 2 = Poorly; 3 = Well; 4 = Very well
  • Items 19–24 (Electronic Media): 1 = Almost never; 2 = Sometimes; 3 = Often; 4 = Almost always
• Scoring and Computational Procedures:
  • Calculate the arithmetic mean for the 12 items constituting the Hispanic Domain: Sum items 4, 5, 6, 13, 14, 15, 16, 17, 18, 22, 23, 24 and divide by 12 (range: 1.0 to 4.0).
  • Calculate the arithmetic mean for the 12 items constituting the Non-Hispanic Domain: Sum items 1, 2, 3, 7, 8, 9, 10, 11, 12, 19, 20, 21 and divide by 12 (range: 1.0 to 4.0).
  • Typology Categorization (Cut-point = 2.5):
    • Bicultural: Hispanic Domain $ge 2.5$ AND Non-Hispanic Domain $ge 2.5$
    • Assimilated: Hispanic Domain $< 2.5$ AND Non-Hispanic Domain $ge 2.5$
    • Separated / Enculturated: Hispanic Domain $ge 2.5$ AND Non-Hispanic Domain $< 2.5$
    • Marginalized: Hispanic Domain $< 2.5$ AND Non-Hispanic Domain $< 2.5$

Permissions & Fee and Test Year

The Bidimensional Acculturation Scale for Hispanics (BAS) was first published in 1996 in the Hispanic Journal of Behavioral Sciences. The instrument was developed with support from academic and public research funding and has been made widely accessible by its authors for non-commercial clinical, research, and pedagogical purposes without royalty fees.

While the scale items are published in the public academic literature, formal publication rights remain associated with the original journal publisher (SAGE Publications) and academic compilations (e.g., Springer Science+Business Media). Researchers seeking to reproduce the instrument in commercial assessment software, books, or revenue-generating platforms must secure formal copyright permissions from SAGE Publications or the respective copyright holders. When utilized in academic theses, clinical trials, or grant-funded investigations, proper citation of the foundational 1996 publication is mandatory.

References

• Berry, J. W. (1980). Acculturation as varieties of adaptation. In A. M. Padilla (Ed.), Acculturation: Theory, models and some new findings (pp. 9–25). Westview Press.
• Berry, J. W. (1997). Immigration, acculturation, and adaptation. Applied Psychology, 46(1), 5–34. https://doi.org/10.1111/j.1464-0597.1997.tb01087.x
• Davis, L. E., & Engel, R. J. (2011). Measuring race and ethnicity. Springer Science & Business Media. https://doi.org/10.1007/978-1-4419-6697-1
• Gordon, M. M. (1964). Assimilation in American life: The role of race, religion, and national origins. Oxford University Press.
• Marín, G., & Gamba, R. J. (1996). A new measurement of acculturation for Hispanics: The Bidimensional Acculturation Scale for Hispanics (BAS). Hispanic Journal of Behavioral Sciences, 18(3), 297–316. https://doi.org/10.1177/07399863960183002
• Marín, G., Sabogal, F., Marín, B. V., Otero-Sabogal, R., & Pérez-Stable, E. J. (1987). Development of a short acculturation scale for Hispanics. Hispanic Journal of Behavioral Sciences, 9(2), 183–205. https://doi.org/10.1177/07399863870092005
• Oetting, E. R., & Beauvais, F. (1990). Orthogonal cultural identification theory: The cultural condition of minority youth. International Journal of the Addictions, 25(sup5), 655–686. https://doi.org/10.3109/10826089009071054

Items of the Scale