Need to Belong scale (NTBS)

Abstract

The Need to Belong Scale (NTBS) is a widely utilized psychometric instrument developed by Mark R. Leary and colleagues (2001, 2013) designed to assess stable individual differences in the fundamental human motivation to form and maintain strong, positive, and enduring interpersonal relationships. Grounded in the evolutionary and motivational belongingness hypothesis formulated by Roy F. Baumeister and Mark R. Leary (1995), the scale operationalizes the pervasive drive for social connection, interpersonal acceptance, and the avoidance of social ostracism or rejection. The standard NTBS consists of 10 self-report items administered on a 5-point Likert scale ranging from 1 (Strongly Disagree) to 5 (Strongly Agree), incorporating three reverse-scored items to attenuate acquiescence bias. Across extensive psychometric investigations, the NTBS demonstrates robust internal consistency (with Cronbach’s alpha coefficients routinely falling between .78 and .87) and substantial test-retest reliability over multi-week intervals (r > .80). Factor analytic investigations have generally affirmed an overarching unidimensional structure reflecting generalized belongingness motivation, although some structural models highlight correlated sub-facets representing affiliation desires versus rejection sensitivity. Convergent validity is evidenced by moderate-to-strong positive associations with attachment anxiety, social comparison orientation, loneliness, and empathy, alongside negative associations with avoidant attachment and emotional autonomy. Construct validity is further underscored by experimental evidence demonstrating that high scorers exhibit heightened cognitive attunement to interpersonal cues, exaggerated distress during laboratory paradigms of social exclusion (such as Cyberball), and a propensity to conform in group contexts to secure relational inclusion. The NTBS serves as a cornerstone instrument across social, personality, developmental, and organizational psychology.

Keywords

Need to Belong Scale, NTBS, Mark Leary, belongingness motivation, interpersonal acceptance, social rejection, social affiliation, sociometer theory, psychometrics, relational value, rejection sensitivity, ostracism, social exclusion.

Authors

The Need to Belong Scale was conceived, developed, and psychometrically validated by a collaborative team of social and personality psychologists:

• Mark R. Leary, Ph.D. — Garonzik Family Family Professor Emeritus of Psychology and Neuroscience at Duke University, Durham, North Carolina, USA. Leary is internationally known for his seminal research on the sociometer theory of self-esteem, self-presentation, social anxiety, and interpersonal motives.
• Kelly M. Kelly, Ph.D. — Formerly affiliated with Wake Forest University and Duke University; contributing researcher to initial conceptualizations and psychometric validation protocols of the scale.
• Catherine A. Cottrell, Ph.D. — Professor of Psychology at New College of Florida, Sarasota, Florida, USA. Her research focuses on prejudice, group dynamics, threat perception, and socio-functional approaches to interpersonal relations.
• Lisa S. Schreindorfer, Ph.D. — Affiliated with Wake Forest University during the initial development and psychometric refinement of the instrument.

Correspondence regarding the instrument and its foundational nomological network was historically directed to Dr. Mark R. Leary at Duke University (Department of Psychology and Neuroscience, Durham, NC 27708; email: [email protected]).

Purpose

The core purpose of the Need to Belong Scale (NTBS) is to quantify individual variation in the strength of an individual’s motivation to be accepted by others, belong to social groups, and avoid social devaluation or isolation. While Baumeister and Leary (1995) posited that the need to belong is a universal, evolutionary drive shared by all intact human beings, they simultaneously emphasized that individuals differ meaningfully in the chronic strength, urgency, and behavioral salience of this motivational system. The NTBS was constructed to transform this foundational theoretical construct into a rigorous, quantitative metric suitable for empirical research across diverse subdisciplines of psychological science.

In personality and social psychology research, the NTBS serves as a primary explanatory variable for individual differences in social cognition, emotional reactivity, and interpersonal behavior. For instance, researchers utilize the scale to predict how individuals process interpersonal information, how vigilantly they scan social environments for signs of inclusion or exclusion, and how they respond to ambiguous interpersonal feedback. Individuals with high NTBS scores consistently demonstrate heightened perceptual sensitivity to facial expressions of emotion (particularly vocal and facial cues of approval or contempt), allocate greater cognitive processing resources to social events, and display enhanced memory retention for collective social interactions.

In clinical, counseling, and health psychology, understanding the intensity of an individual’s belongingness need offers substantial explanatory power regarding psychopathology and subjective well-being. A high need to belong, particularly when combined with low perceived relational value or social deficit, places individuals at an elevated vulnerability for major depressive disorder, generalized social anxiety disorder, borderline personality dynamics, and profound feelings of existential loneliness. Conversely, possessing a low need to belong may shed light on avoidant or schizoid personality orientations, where interpersonal detachment is not accompanied by standard distress responses. Furthermore, health psychologists employ the NTBS to examine how unmet affiliation needs translate into neuroendocrine stress responses, dysregulated cardiovascular functioning, and compromised immune parameters.

Within organizational and educational contexts, the NTBS is applied to elucidate workplace dynamics, team cohesion, and organizational citizenship behaviors. Employees exhibiting high belongingness needs frequently demonstrate stronger commitment to collaborative group goals, heightened compliance with corporate norms, and increased susceptibility to burnout when subjected to workplace incivility, exclusion, or remote work isolation. In academic environments, the scale clarifies student retention, peer socialization processes, and the psychological impact of campus climate initiatives designed to cultivate inclusive communities.

Psychological Construct

The construct measured by the NTBS is the need to belong, defined as a pervasive, chronic drive to establish, cultivate, and protect positive, stable, and emotionally significant interpersonal attachments. According to foundational conceptualizations, this construct is not merely synonymous with extraversion, sociability, or sensation-seeking; rather, it reflects a deeply rooted affective and motivational requirement for sustained social communion, relational value, and collective membership. The construct encompasses several interrelated operational facets that manifest within cognitive, affective, and behavioral domains:

1. Desire for Interpersonal Acceptance and Inclusion

At the center of the construct is the proactive, appetitive desire to be welcomed, appreciated, and integrated into social configurations. This facet represents the positive drive toward intimacy, mutual caring, and psychological closeness. It involves an explicit longing to be understood, valued, and embraced by friends, romantic partners, and broader social groups. For individuals high in this dimension, social interactions are viewed not simply as casual diversions, but as essential opportunities to confirm mutual regard and shared commitment. Statements such as “I want other people to accept me” and “I have a strong ‘need to belong’” encapsulate this direct, conscious motivational orientation.

2. Rejection Sensitivity and Threat Vigilance

Symmetrically linked to the desire for inclusion is an acute sensitivity to social exclusion, rejection, abandonment, or devaluation. The belongingness motivation operates through an active “threat detection” apparatus. Individuals with an elevated need to belong exhibit heightened emotional reactivity when faced with perceived relational neglect, such as being omitted from an invitation or sensing aloofness in a conversational partner. Their self-evaluations and affective states fluctuate in close synchrony with real, imagined, or anticipated cues of interpersonal disfavor. Items such as “It bothers me a great deal when I am not included in other people’s plans” and “My feelings are easily hurt when I feel that others do not accept me” directly tap into this reactive vulnerability.

3. Behavioral Affiliative Accommodation

The construct further manifests as behavioral regulation oriented toward appeasement, behavioral assimilation, and the mitigation of interpersonal conflict. Because belongingness is essential to high scorers, they often engage in strategic self-monitoring and behavioral adjustment to ensure they remain in good standing with their peers. This includes conscious efforts to conform to group norms, avoid controversial behaviors that might provoke ostracism, and maintain high levels of agreeableness. As captured by the item “I try hard not to do things that will make other people avoid or reject me,” the construct reflects an active behavioral agenda to minimize interpersonal friction.

4. Intolerance of Social Isolation and Solitude

A further psychological manifestation involves discomfort with prolonged physical or psychological detachment from close others. Solitude, which may be experienced by low scorers as peaceful, restorative, or autonomous, is frequently experienced by individuals high in the need to belong as an aversive, anxiety-provoking state characterized by deprivation and alienation. Reverse-scored items like “Being apart from my friends for long periods of time does not bother me” and direct items such as “I do not like being alone” reflect this dimension of relational dependency versus self-contained comfort in isolation.

Theoretical Framework

The Need to Belong Scale is firmly situated within the Belongingness Hypothesis formulated by Roy Baumeister and Mark Leary in their seminal 1995 treatise. Baumeister and Leary proposed that human beings are fundamentally motivated by a powerful, biologically ingrained drive for interpersonal connection that evolved through natural selection to ensure survival and reproductive success. Throughout hominid evolutionary history, solitary individuals faced immense challenges in foraging, hunting, defending against predators, and protecting offspring. Group membership, cooperative alliances, and stable pair bonds conferred decisive adaptive advantages. Consequently, evolutionary mechanisms favored individuals endowed with a psychological architecture that motivated them to form relationships and experience distress upon relational dissolution.

Baumeister and Leary outlined several formal criteria that define the need to belong as a fundamental human motivation rather than a learned or secondary drive:

• Ubiquity Across Cultures: The drive for social attachment manifests universally across geographic regions, historical epochs, and diverse societal structures, transcending localized cultural conditioning.
• Cognitive Processing Hegemony: The need guides and biases human cognitive processing. Individuals instinctively categorize their social worlds into relational ingroups and outgroups, process interpersonal information more deeply than non-social stimuli, and demonstrate pervasive memory biases for social transactions.
• Emotional Contingency: Positive emotions (joy, contentment, relief) are inextricably linked to the formation and preservation of social bonds, whereas negative emotions (anxiety, grief, depression, shame) arise reliably in response to isolation, social rejection, and ostracism.
• Satiation and Substitution: Like physiological drives (such as hunger or thirst), the need to belong demonstrates properties of satiation and substitution. Once an individual possesses a stable network of reciprocal, caring relationships, the drive diminishes in urgency. Conversely, when existing bonds are broken, individuals seek replacement relationships to re-establish homeostatic equilibrium.
• Severe Maladaptive Consequences of Deprivation: In the chronic absence of belongingness, human beings suffer profound psychological, behavioral, and physiological degradation, including compromised immune functioning, elevated mortality rates, neuroendocrine dysregulation, and heightened rates of psychiatric morbidity.

The NTBS is also inextricably linked to Sociometer Theory (Leary et al., 1995; Leary & Baumeister, 2000). Sociometer theory posits that self-esteem is not an end in itself, but rather an internal, psychological gauge (a “sociometer”) that continuously monitors the social environment for cues of inclusion, acceptance, rejection, and exclusion. From this theoretical standpoint, fluctuations in self-esteem represent psychological warning signals alerting the individual that their relational value to others is dropping. The NTBS functions as an index of the sensitivity and chronic baseline set-point of this sociometer mechanism: individuals with an elevated need to belong possess a highly sensitized sociometer that scans continuously for the slightest signals of relational devaluation.

Validity

The construct validity of the NTBS was extensively established by Leary, Kelly, Cottrell, and Schreindorfer (2001, 2013) across multiple independent cohorts comprising university undergraduates, community adults, and clinical participants, and has since been corroborated globally.

Convergent Validity

The NTBS displays strong, theoretically coherent correlations with established social and personality constructs:

• Attachment Orientations: The NTBS correlates moderately to strongly with adult attachment anxiety (typically r = .40 to .55), reflecting the shared preoccupation with interpersonal acceptance and fears of abandonment. Conversely, it correlates negatively with avoidant attachment (r = -.25 to -.40), as avoidantly attached individuals psychologically devalue interpersonal bonds to protect against rejection vulnerability.
• Interpersonal Sensitivity and Empathy: Scores on the NTBS correlate positively with scales assessing empathy (r = .30 to .42), emotional contagion, and social comparison orientation (r = .35 to .48), confirming that individuals with a pronounced belongingness drive are attuned to the affective states and evaluative standards of those around them.
• Sociability and Extraversion: The NTBS correlates positively, though modestly, with the extraversion domain of the Five-Factor Model (r = .20 to .35), demonstrating that while belongingness motivates social contact, it represents a distinct motivational drive rather than sheer energetic extraversion.
• Loneliness and Social Distress: Moderate positive associations are consistently documented between the NTBS and measures of loneliness (such as the UCLA Loneliness Scale, r = .25 to .38) and generalized social anxiety (r = .30 to .45), highlighting that a potent longing for social connection frequently outpaces perceived relational satisfaction.

Discriminant Validity

The NTBS is empirically distinguishable from conceptually adjacent but distinct psychological traits. It exhibits negligible correlations with general cognitive ability, intelligence, and academic achievement (r < .08). Although the scale relates to neuroticism (r = .25 to .40) due to shared elements of social evaluation concern, multivariate analyses show that the NTBS retains independent predictive validity for social and group-oriented behaviors after partialling out neuroticism, trait negative affectivity, and generalized trait anxiety. Furthermore, the NTBS is distinguishable from social desirability bias; correlations with the Marlowe-Crowne Social Desirability Scale are typically non-significant or trivial (|r| < .12), indicating that high NTBS scores do not simply reflect a generalized attempt to present oneself in a culturally sanctioned manner.

Predictive and Experimental Validity

Experimental studies have validated the NTBS through behavioral and physiological endpoints. In laboratory ostracism paradigms, such as the widely used Cyberball paradigm (Williams, 2007), individuals scoring high on the NTBS experience significantly greater drops in fundamental psychological needs (belonging, self-esteem, meaningful existence, control) and report more intense negative affect following exclusion compared to low-scoring counterparts. Furthermore, Pickett, Gardner, and Knowles (2004) demonstrated that individuals scoring high on the NTBS show superior accuracy in identifying and decoding nonverbal social cues, such as vocal tone and facial micro-expressions of emotion, reflecting heightened motivation-driven perceptual acuity.

Reliability

The psychometric reliability of the Need to Belong Scale has been extensively evaluated across exploratory, confirmatory, and longitudinal paradigms, demonstrating strong stability and internal cohesion across diverse demographic and cultural samples.

Internal Consistency

Across the foundational validation investigations reported by Leary et al. (2013), Cronbach’s alpha coefficients for the 10-item instrument ranged from .78 to .87 across undergraduate and adult community samples. In subsequent cross-national investigations—including validated translations in German, Dutch, Chinese, Japanese, and Turkish—internal consistency values have consistently replicated within the .76 to .88 range. McDonald’s omega (ω), a more robust metric under conditions of tau-equivalence violation, similarly yields values exceeding .80, indicating that the latent variable of belongingness motivation accounts for a substantial proportion of item variance.

Item-total correlations across the 10 items demonstrate satisfactory performance. Corrected item-total correlations typically range between .42 and .68. The direct-scored items (e.g., Item 5: “I want other people to accept me”; Item 8: “I have a strong ‘need to belong’”) exhibit the highest item-total correlations, often exceeding .60, whereas the reverse-scored items (e.g., Item 1, Item 3, and Item 7) demonstrate somewhat lower yet psychometrically acceptable item-total correlations ranging between .38 and .52.

Test-Retest Stability

Because the NTBS is theorized to assess a stable, dispositional motivational trait rather than a transient, fluctuating state, temporal stability is an essential psychometric criterion. In test-retest investigations conducted over a 10-week interval by Leary and colleagues, the Pearson correlation coefficient was r = .87 (p < .001), indicating remarkable trait stability over time. Independent longitudinal studies spanning periods from 3 weeks to 6 months have corroborated these findings, reporting test-retest coefficients consistently falling between .78 and .85. These longitudinal data verify that individual differences in belongingness motivation remain remarkably stable across everyday environmental shifts.

Factor Analysis

The underlying dimensionality of the 10-item NTBS has been the subject of extensive empirical inquiry, employing both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).

Exploratory Factor Analysis (EFA)

In initial principal components and maximum likelihood factor analyses conducted by Leary et al. (2001, 2013), scree plots and eigenvalue-greater-than-one criteria generally supported a predominant primary factor. The primary eigenvalue typically accounts for 32% to 44% of the total variance, with all 10 items loading significantly onto this generalized belongingness dimension (standardized loadings predominantly ranging from .45 to .75). However, in unconstrained exploratory extractions, a secondary factor frequently emerges that maps directly onto the three reverse-scored items (Items 1, 3, and 7), reflecting a well-documented methodological artifact common to Likert-type scales incorporating reverse phrasing (method effect associated with negatively worded items).

Confirmatory Factor Analysis (CFA)

To resolve the debate regarding whether the NTBS is strictly unidimensional or multidimensional, subsequent psychometric investigations have compared competing structural models:

• Strict Unidimensional Model: A single-factor model specifying all 10 items loading on a single latent “Need to Belong” construct. In large samples, this model typically demonstrates marginal to acceptable fit indices: Comparative Fit Index (CFI) = .88 – .92, Tucker-Lewis Index (TLI) = .85 – .90, Root Mean Square Error of Approximation (RMSEA) = .068 – .084, and Standardized Root Mean Square Residual (SRMR) = .045 – .060.
• Bifactor Model / Single Factor with Correlated Method Effects: A structural model that specifies a single general belongingness factor while simultaneously modeling a latent method factor for the reverse-scored items (or allowing correlated residual error variances between Items 1, 3, and 7). This specification consistently yields superior fit metrics: χ²/df < 2.5, CFI > .96, TLI > .95, RMSEA < .048 (90% CI [.032, .061]), and SRMR < .038.
• Two-Factor Correlated Model: Some researchers (e.g., Mellor et al., 2008) have argued for a substantive two-factor model distinguishing between: (a) Desire for Acceptance / Affiliation (Items 2, 4, 5, 6, 8, 9, 10), and (b) Indifference to Acceptance / Autonomy (represented by the reverse-scored Items 1, 3, 7). However, because these two latent factors correlate strongly (r > .60) and the two-factor structure fails to consistently demonstrate distinct predictive utility over the omnibus score, psychometric consensus strongly endorses the calculation of a single, unified total score.

Instrument / Measurement Tool

• Instrument Name: Need to Belong Scale (NTBS)
• Alternative Names: Leary’s Need to Belong Scale, NTB Scale
• Authors: Mark R. Leary, Kelly M. Kelly, Catherine A. Cottrell, and Lisa S. Schreindorfer (2001, 2013)
• Format / Administration: Self-report paper-and-pencil questionnaire or computerized/online survey; group or individual administration
• Completion Time: Approximately 2 to 3 minutes
• Target Population: Adolescents and adults (ages 14 and above); adaptable across general, academic, and clinical populations
• Item Count: 10 items
• Response Scale: 5-point Likert response format:
  • 1 = Strongly Disagree
  • 2 = Moderately Disagree
  • 3 = Neither Agree nor Disagree
  • 4 = Moderately Agree
  • 5 = Strongly Agree
• Scoring and Transformation Rules:
  • Step 1 (Reverse-Scoring): Invert the scoring of the three reverse-worded items: Item 1, Item 3, and Item 7. The transformation formula is: New Score = 6 − Raw Score (i.e., 1 becomes 5, 2 becomes 4, 3 remains 3, 4 becomes 2, and 5 becomes 1).
  • Step 2 (Aggregation): Compute the overall Need to Belong score by calculating either:
    • Total Sum Score: Sum the numerical values of all 10 items (after reverse-scoring). Scores range from 10 to 50, with higher totals denoting a stronger need to belong.
    • Mean Scale Score: Divide the total sum by 10 (the total number of items). Scores range from 1.0 to 5.0, maintaining the original response metric.
  • Normative Interpretation: In normative undergraduate and community cohorts, mean scale scores typically center around 3.40 to 3.65 (with standard deviations between 0.60 and 0.75). Sum scores between 34 and 37 reflect an average belongingness drive; scores exceeding 42 indicate highly elevated motivation and marked rejection vulnerability; scores below 28 indicate an unusually low chronic belongingness need.

Permissions & Fee and Test Year

The Need to Belong Scale was initially drafted and circulated in unpublished form in 2001 by Mark R. Leary, Kelly M. Kelly, Catherine A. Cottrell, and Lisa S. Schreindorfer at Wake Forest University. Its formal comprehensive peer-reviewed psychometric validation appeared in 2013 in the Journal of Personality Assessment.

Licensing and Accessibility: The NTBS is in the public domain for non-commercial academic, scientific, and educational research purposes. Dr. Mark R. Leary has made the instrument freely available to scholars, researchers, and students via university repository archives and scholarly platforms without requiring licensing fees, formal copyright clearance, or written permission for standard academic applications. However, researchers publishing empirical work using the NTBS are required to cite the primary validation publication (Leary et al., 2013) as well as the foundational theoretical paper (Baumeister & Leary, 1995). For commercial applications, diagnostic battery inclusion, or commercial digital health software integrations, prospective users must consult the primary copyright holder and authors directly.

References

• Baumeister, R. F., & Leary, M. R. (1995). The need to belong: Desire for interpersonal attachments as a fundamental human motivation. Psychological Bulletin, 117(3), 497–529. https://doi.org/10.1037/0033-2909.117.3.497
• Leary, M. R., & Baumeister, R. F. (2000). The nature and function of self-esteem: Sociometer theory. In M. P. Zanna (Ed.), Advances in Experimental Social Psychology (Vol. 32, pp. 1–62). Academic Press. https://doi.org/10.1016/S0065-2601(00)80003-9
• Leary, M. R., & Hoyle, R. H. (Eds.). (2012). Handbook of individual differences in social behavior. Guilford Press.
• Leary, M. R., Kelly, K. M., Cottrell, C. A., & Schreindorfer, L. S. (2001). Individual differences in the need to belong. Unpublished manuscript, Wake Forest University, Winston-Salem, NC.
• Leary, M. R., Kelly, K. M., Cottrell, C. A., & Schreindorfer, L. S. (2012). Individual differences in the need to belong: Mapping the nomological network. Unpublished manuscript, Duke University, Durham, NC.
• Leary, M. R., Kelly, K. M., Cottrell, C. A., & Schreindorfer, L. S. (2013). Construct validity of the Need to Belong Scale: Mapping the nomological network. Journal of Personality Assessment, 95(6), 610–624. https://doi.org/10.1080/00223891.2013.819511
• Leary, M. R., Tambor, E. S., Terdal, S. K., & Downs, D. L. (1995). Self-esteem as an interpersonal monitor: The sociometer hypothesis. Journal of Personality and Social Psychology, 68(3), 518–530. https://doi.org/10.1037/0022-3514.68.3.518
• Mellor, D., Stokes, M., Firth, L., Hayashi, Y., & Cummins, R. (2008). Need for belonging, relationship satisfaction, loneliness, and life satisfaction. Personality and Individual Differences, 45(3), 213–218. https://doi.org/10.1016/j.paid.2008.03.020
• Pickett, C. L., Gardner, W. L., & Knowles, M. (2004). Getting a cue: The need to belong and enhanced sensitivity to social cues. Personality and Social Psychology Bulletin, 30(9), 1095–1107. https://doi.org/10.1177/0146167204264060
• Williams, K. D. (2007). Ostracism. Annual Review of Psychology, 58, 425–452. https://doi.org/10.1146/annurev.psych.58.110405.085641

13. Items of the Scale (Questionnaire)