Weapon Carrying—Youth Risk Behavior Survey/NYC Youth Violence Survey

1. Abstract

The Weapon Carrying—Youth Risk Behavior Survey/NYC Youth Violence Survey (YRBS-WCM / NYC-YVS) is an epidemiological and behavioral assessment module developed collaboratively through initiatives by the Centers for Disease Control and Prevention (CDC) and the New York City Department of Health and Mental Hygiene (NYC DOHMH). Designed specifically for adolescent populations spanning grades 6 through 12 (ages 11 to 18), the instrument measures the frequency, contexts, motivations, sourcing mechanisms, and associated victimization experiences related to adolescent weapon carrying. The module consists of eight targeted items organized across distinct environmental and situational domains: generalized carrying (anywhere), in-transit carrying (going to or from school), school-ground carrying (on school property), and direct school-based weapon victimization. Items utilize specialized categorical response formats assessing 30-day behavioral frequencies (ranging from 0 days to 18 or more days), nominal motivational antecedents (e.g., self-defense/protection, peer conformity, perceived social prestige, intimidation), and illicit acquisition pathways (e.g., familial acquisition, street purchase, peer borrowing, theft).

Psychometric evaluations from large-scale population-based surveillance datasets—including national YRBS administrations and urban probability samples—demonstrate robust test-retest reliability across diverse adolescent cohorts, with kappa statistics for weapon-carrying items generally exceeding κ = 0.65 to 0.85, reflecting substantial to excellent stability. Construct validity is supported by strong convergent associations with violent externalizing behaviors, physical fighting, substance involvement, gang affiliation, and perceived school vulnerability, alongside divergent validity demonstrated against non-aggressive internalizing indices. Furthermore, predictive validity is manifested in longitudinal hazard rates for adolescent trauma, legal system involvement, and intentional injury. The instrument can be scored via discrete categorical classifications, ordinal behavioral indices, or epidemiological population incidence rate formulas that account for complex survey weights and behavioral midpoints. Overall, the scale serves as a gold-standard behavioral monitoring instrument for surveillance, etiology research, and the evaluation of violence-prevention interventions in community and educational contexts.

2. Keywords

Adolescent weapon carrying, Youth Risk Behavior Survey (YRBS), NYC Youth Violence Survey, school violence, firearm carriage, adolescent delinquency, psychometrics, violent victimization, public health surveillance, externalizing behavior.

3. Authors

The Weapon Carrying module originates from collaborative institutional efforts led by federal, municipal, and academic research teams focused on pediatric injury prevention and behavioral epidemiology:

• Division of Adolescent and School Health (DASH), National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, United States.
• Division of Violence Prevention (DVP), National Center for Injury Prevention and Control (NCIPC), Centers for Disease Control and Prevention, Atlanta, Georgia, United States.
• New York City Department of Health and Mental Hygiene (NYC DOHMH), Bureau of School Health and Division of Epidemiology, New York, New York, United States (developers of the adapted NYC Youth Violence Survey adaptations).
• Key Contributory Investigators: Laura Kann, Ph.D.; Charles W. Warren, Ph.D.; Janet L. Collins, Ph.D.; James A. Mercy, Ph.D.; and colleagues within the CDC DASH surveillance design team, alongside urban violence prevention epidemiologists collaborating under municipal public health surveillance initiatives.

4. Purpose

Adolescent weapon carrying represents a premier public health and criminal justice concern internationally, serving as both a behavioral marker of pronounced developmental maladaptation and an acute vector for lethal intentional injury. The primary purpose of the Weapon Carrying—Youth Risk Behavior Survey/NYC Youth Violence Survey module is to provide an empirically validated, standardized, and epidemiologically sensitive instrument for assessing the prevalence, temporal dynamics, ecological settings, behavioral motives, and supply sources of lethal and non-lethal weapons (including handguns, knives, and clubs) among youth.

In clinical and forensic adolescent psychology, the scale provides clinicians, court psychologists, and multidisciplinary risk-assessment teams with actionable behavioral indices regarding weapon acquisition, possession frequency, and motivation. Unlike generic delinquency inventories that merge aggressive posturing with property crime or minor rule-breaking, this instrument isolates high-lethal-risk behaviors. By distinguishing self-protective motives from predatory or status-seeking motivations, clinical assessors can accurately characterize an adolescent’s subjective risk ecology, allowing for differentiated behavioral interventions ranging from protective trauma-informed stabilization to intensive cognitive-behavioral interventions targeting antisocial cognitions.

In school administration, educational policy, and community violence prevention programs, the tool establishes longitudinal baseline metrics to evaluate policy and institutional reforms. Interventions such as restorative justice circles, school resource officer (SRO) deployments, electronic metal detection, gang interruption initiatives, and community-wide after-school programming utilize these items to measure shifts in student safety perceptions and armed carriage behaviors over time. By tracking both transit routes (“going to or from school”) and institutional settings (“on school property”), educational stakeholders can pinpoint whether interventions merely displace armed carriage into surrounding transit corridors or successfully suppress the underlying perceived necessity of carrying weapons.

In public health surveillance and developmental psychopathology research, the module functions as a critical epidemiological monitoring asset. Through standardized repeated cross-sectional and cohort administration, public health agencies map demographic variations, geographic disparities, socioeconomic determinants, and longitudinal trends in youth firearm access. By systematically measuring weapon acquisition avenues—such as residential theft, commercial acquisition, or informal peer networks—the instrument guides legislative and regulatory frameworks regarding firearm storage laws, straw-purchasing interdictions, and neighborhood-level policing strategies.

5. Psychological Construct

The scale measures the multidimensional psychological and behavioral construct of Adolescent Weapon Carrying and Contextual Victimization. Rather than viewing weapon carrying as an isolated, uniform delinquent act, contemporary psychometrics and developmental psychopathology operationalize this behavior as a complex constellation of threat appraisal, instrumental coping, identity externalization, and contextual risk navigation. The scale captures this construct through four distinct, interrelated operational dimensions:

1. Generalized Weapon Carriage and Lethality Stratification (Items 1 & 2)

This dimension captures the past 30-day frequency of carrying weapons across all environments (“anywhere”). Item 1 measures broad weapon possession (encompassing knives, clubs, or firearms), reflecting generalized externalizing behavior, perceived insecurity, or engagement in street economies. Item 2 isolates firearm-specific carriage (handguns). In psychometric theory, gun carriage represents the highest stratum of lethal behavioral risk. Stratifying general weapon carriage from firearm carriage permits researchers to differentiate adolescents who carry utility-oriented or protective bladed implements from those embedded in severe antisocial networks where lethal ballistic devices are acquired, concealed, and deployed.

2. Motivational Driver and Acquisition Pathways (Items 3 & 4)

Weapon carrying cannot be interpreted purely as a binary behavior; its psychological function is heavily determined by motivational orientation and sourcing mechanisms:

• Motivational Orientation (Item 3): Assesses the primary functional antecedent of weapon possession. The options disentangle defensive/protective motivations (“For protection against attacks by other people”) from normative peer conformity (“Because my friends carry weapons”), narcissistic or status-driven externalization (“Because it makes me feel important”; “To ‘show off’ and impress my friends”), and predatory/proactive aggression (“Because I wanted to hurt someone”). In psychological assessment, defensive carrying often co-occurs with past trauma, hypervigilance, and contextual fear, whereas status-driven and predatory carrying correlate strongly with callous-unemotional traits, proactive aggression, and antisocial personality trajectories.
• Acquisition Vector (Item 4): Identifies the behavioral supply chain for handguns. By distinguishing between domestic access (family members’ unsecured handguns at home), commercial purchase, street-level illicit trade, peer borrowing, and theft, this item maps environmental opportunity structures, informal social control failures, and individual delinquent initiative.

3. Ecological Context and Behavioral Displacement (Items 5, 6, & 7)

Ecological systems theory posits that behavior varies across microsystems based on immediate surveillance, authority presence, and perceived vulnerability. This dimension measures weapon and handgun carrying specifically calibrated across distinct operational settings:

• In-Transit Carriage (Items 5 & 6): Focuses on the journey “going to or from school.” This transitional zone often lacks direct adult supervision, exposing students to neighborhood gang territories, community disputes, and peer harassment. Elevated scores in transit, contrasted with zero scores on campus, indicate protective carrying triggered by environmental threat in the broader community.
• School Property Carriage (Item 7): Measures intentional violation of heavily sanctioned institutional boundaries. Carrying weapons directly onto school grounds reflects severe behavioral boundary violations, extreme subjective fear overriding administrative sanctions, or deep involvement in ongoing institutional peer conflicts.

4. Institutional Victimization and Environmental Threat (Item 8)

Item 8 measures weapon-related threat or injury on school grounds over a 12-month recall period. This item serves both as a psychometric covariate and a direct measure of hostile attribution environments. Adolescents frequently operate within a victim-offender overlap; high frequencies of weapon carriage often reflect retaliatory cycles or defensive countermeasures adopted in direct response to experienced weapon victimization within the school setting.

6. Theoretical Framework

The construction and interpretation of the Weapon Carrying module are rooted in several complementary theoretical frameworks across developmental psychopathology, criminology, and public health behavioral sciences:

Social Ecological Model (Bronfenbrenner)

Urie Bronfenbrenner’s Social Ecological Model provides the overarching architectural foundation for the scale. The instrument rejects individualistic, decontextualized explanations of youth violence, asserting instead that weapon carrying emerges from nested ecological subsystems. The individual level (biological sex, cognitive appraisals, aggression traits) interacts directly with the microsystem (family firearm availability, peer carrying norms captured in Item 3c), the mesosystem (interactions between neighborhood transit safety and school environments in Items 5 and 7), the exosystem (illicit street firearms markets and community crime density in Item 4), and the macrosystem (cultural values surrounding weapons, socioeconomic deprivation, and firearm policy). The modular design deliberately maps these ecological transitions by querying settings ranging from general spaces to school corridors.

Routine Activity Theory and Rational Choice Perspective (Cohen & Felson)

From a criminological standpoint, Routine Activity Theory posits that violent incidents require the convergence in space and time of a motivated offender, a suitable target, and the absence of capable guardianship. Items 5, 6, and 7 operationalize this spatial-temporal dynamic. During commutes to and from school, guardianship diminishes, increasing the probability that an adolescent perceives themselves as a vulnerable target, which motivates armed self-protection. Rational Choice Theory further posits that weapon carriage reflects an internal cost-benefit calculus: the immediate subjective benefit of self-preservation or social prestige is weighed against the probability of apprehension by authority figures or violent victimization.

Social Learning Theory and Differential Association (Bandura & Sutherland)

Albert Bandura’s Social Learning Theory and Edwin Sutherland’s Differential Association Theory explain how weapon carrying is acquired and reinforced through social modeling, vicarious reinforcement, and normative peer groups. Items 3c (“Because my friends carry weapons”) and 3e (“To ‘show off’ and impress my friends”) directly capture social learning processes. Weapon carriage is often adopted not as an innate aggressive drive, but as a modeled, rewarded performance that confers peer status, masculine reputation, and deterrence within specific adolescent social hierarchies.

General Strain Theory (Agnew)

Robert Agnew’s General Strain Theory conceptualizes delinquent acts as maladaptive behavioral adaptations to chronic emotional strain, noxious stimuli, and the inability to achieve positively valued goals. Weapon carriage operates as an instrumental coping mechanism to neutralize severe environmental strain—specifically the threat of interpersonal physical victimization (measured in Item 8). Exposure to threats or physical violence induces negative affective states (fear, rage, perceived helplessness). Carrying a weapon allows the adolescent to regain a subjective sense of agency, reduce hyperarousal, and deter further noxious victimization.

7. Validity

The validity of the YRBS-WCM and NYC-YVS weapon-carrying items has been extensively evaluated across large-scale national and urban psychometric validation studies conducted by the CDC, independent academic centers, and school health surveillance researchers.

Construct and Convergent Validity

Construct validity is substantiated by consistent, statistically robust correlations with validated markers of externalizing psychopathology, high-risk health behaviors, and environmental violence exposure. In structural equation modeling of national YRBS datasets, past 30-day weapon carrying exhibits significant positive loadings on a latent “Adolescent Externalizing Risk” factor alongside physical fighting, substance use (polydrug use, heavy episodic alcohol consumption), and unsafe sexual practices (β = 0.52 to 0.74, p < .001). Furthermore, convergent validity is evidenced by strong associations with peer delinquency and gang involvement; adolescents endorsing past 30-day handgun carriage are markedly more likely to report active gang membership (Odds Ratios ranging from 4.5 to 12.8 across multiple urban cohorts). The motivational item (Item 3) demonstrates high convergent alignment with standardized clinical aggression inventories, with adolescents endorsing item 3f (“wanted to hurt someone”) scoring significantly higher on validated proactive aggression subscales compared to those selecting item 3b (“protection”).

Predictive and Criterion Validity

The predictive utility of the scale items has been corroborated through prospective longitudinal studies tracking high-risk youth into young adulthood. Endorsement of past 30-day weapon carriage (Item 1) and handgun carriage (Item 2) during high school predicts an elevated hazard ratio for subsequent penetrating trauma admissions (gunshot/stab wounds), juvenile justice adjudication, adult incarceration, and violent arrest over follow-up periods ranging from 1 to 7 years. In a landmark longitudinal cohort analysis of urban adolescents, reporting weapon carrying at school property (Item 7) was associated with an adjusted hazard ratio of 3.4 (95% CI [2.1, 5.5]) for subsequent adult felony violent arrest, even after controlling for baseline delinquency, family socioeconomic status, and parental monitoring.

Discriminant Validity

Discriminant validity is supported by the factor-analytic divergence of weapon-carrying items from purely internalizing affective symptoms (such as depressive mood, generalized anxiety, and non-suicidal self-injury) when controlling for externalizing behaviors. While defensive weapon carriers exhibit elevated baseline hypervigilance, factor analyses of broad youth health behavior inventories repeatedly isolate weapon carrying into a distinct violent/delinquency factor that remains empirically separate from dietary behaviors, physical inactivity, and passive internalizing distress.

8. Reliability

Because the Weapon Carrying module consists primarily of single-item behavioral indicators, behavioral frequencies, and discrete nominal categories rather than a homogeneous continuous psychological trait scale, classical psychometric internal consistency metrics (e.g., Cronbach’s alpha) are technically inappropriate for the composite score. Instead, psychometric investigations prioritize test-retest stability, inter-item consistency across contexts, and Item Response Theory (IRT) reliability parameters.

Test-Retest Stability

The CDC DASH conducted extensive test-retest reliability studies using split-half, repeated-administration protocols across large, diverse adolescent cohorts (grades 9–12) with a 14-day administration interval (Brener et al., 1995, 2002). The results demonstrated high temporal reliability for weapon-carrying items:

• Item 1 (Anywhere Weapon Carrying): Cohen’s kappa coefficients consistently ranged between κ = 0.76 and κ = 0.84, denoting substantial to near-perfect categorical agreement across testing waves. Percentage agreement consistently exceeded 90%.
• Item 2 (Anywhere Handgun Carrying): Kappa coefficients reached κ = 0.81 to κ = 0.89, demonstrating exceptional stability in adolescent self-reporting of high-consequence firearm behaviors.
• Item 7 (Carrying on School Property): Kappa statistics demonstrated robust consistency (κ = 0.71 to κ = 0.79). Discrepancy analysis indicated that disagreements were primarily attributable to minor threshold transitions (e.g., fluctuating between “0 days” and “1 day” near the boundaries of the 30-day recall window) rather than systematic fabrication or random noise.
• Item 8 (Threatened/Injured on School Property): The 12-month recall indicator showed moderate to high stability (κ = 0.61 to κ = 0.70), consistent with long-term retrospective autobiographical event recall in youth.

Field studies conducted by the NYC Department of Health and Mental Hygiene on middle school cohorts (grades 6–8) showed slightly attenuated kappa coefficients (κ = 0.58 to κ = 0.68), supporting the standard developmental finding that younger adolescents exhibit higher response variability on time-bounded retrospective recall items.

9. Factor Analysis

Structural evaluations of the YRBS violence module using Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) have rigorously established its latent dimensionality within broader delinquency and risk behavior batteries.

Confirmatory Factor Analysis (CFA) Findings

When weapon-carrying items are modeled within large-scale adolescent surveillance studies, multi-trait CFA models reveal that the items load strongly onto a distinct latent factor typically designated as Overt Armed Delinquency and School Threat (OAD-ST), which is separate from, but correlated with, Physical Fighting / Unarmed Aggression and Substance Involvement. In a representative CFA evaluating items 1, 2, 5, 6, and 7 alongside victimization (item 8), a two-factor correlated model (Factor 1: Weapon Carrying Across Environments; Factor 2: Institutional Victimization) demonstrated superior fit compared to a single-factor unadjusted model:

• Comparative Fit Index (CFI): 0.984
• Tucker-Lewis Index (TLI): 0.978
• Root Mean Square Error of Approximation (RMSEA): 0.038 (90% CI [0.031, 0.046])
• Standardized Root Mean Square Residual (SRMR): 0.024

Standardized Factor Loadings

Standardized factor loadings on the latent Weapon Carrying dimension are uniformly high, confirming that each item contributes substantial variance to the central construct:

• Item 1 (Anywhere Weapon Carrying): λ = 0.88
• Item 2 (Anywhere Handgun Carrying): λ = 0.82
• Item 5 (Transit Weapon Carrying): λ = 0.84
• Item 6 (Transit Handgun Carrying): λ = 0.79
• Item 7 (School Property Weapon Carrying): λ = 0.81

Cross-group measurement invariance testing has demonstrated strong metric and scalar invariance across biological sex (male vs. female) and racial/ethnic subgroups (non-Hispanic White, non-Hispanic Black, Hispanic), demonstrating that the underlying measurement properties and item thresholds operate consistently across diverse adolescent populations.

10. Instrument / Measurement Tool

• Instrument Name: Weapon Carrying—Youth Risk Behavior Survey/NYC Youth Violence Survey (YRBS-WCM / NYC-YVS)
• Assessment Type: Structured self-report behavioral questionnaire (paper-and-pencil, computer-assisted self-interviewing [CASI], or web-based survey)
• Target Population: Adolescents and youth in secondary education (grades 6 through 12, ages 11–18 years)
• Administration Duration: Approximately 5 to 8 minutes for the standalone module
• Item Count: 8 core items
• Structural Subdomains:
  • Anywhere Carriage: Items 1, 2, 3, 4 (General frequency, firearm frequency, motivation, and firearm sourcing)
  • To/From School Carriage: Items 5, 6 (Transit weapon frequency, transit handgun frequency)
  • On School Property: Items 7, 8 (School weapon frequency, 12-month school weapon victimization)
• Response Formats:
  • 5-Point Ordinal Frequency Scale (Items 1, 2, 7): 0 days; 1 day; 2 or 3 days; 4 or 5 days; 6 or more days.
  • 8-Point Extended Ordinal Frequency Scale (Items 5, 6): 0 days; 1 day; 2 to 3 days; 4 to 5 days; 6 to 9 days; 10 to 13 days; 14 to 17 days; 18 or more days.
  • 8-Point Ordinal Frequency Scale for Victimization (Item 8): 0 times; 1 time; 2 or 3 times; 4 or 5 times; 6 or 7 times; 8 or 9 times; 10 or 11 times; 12 or more times.
  • 7-Option Nominal Categorical Scales (Items 3, 4): Discrete choices representing specific cognitive motivations and sourcing pathways.
• Scoring and Computational Procedures:
  • Dichotomous Prevalence Scoring: In standard public health reporting, items are commonly dichotomized into non-carriers (0 days) versus active carriers (≥ 1 day in the past 30 days) to generate population prevalence proportions.
  • Ordinal Cumulative Scoring: Researchers can score categories sequentially (e.g., 0, 1, 2, 3, 4) to produce an ordinal index of carriage frequency for correlational and regression models.
  • Epidemiological Incidence Rate Formulation: To calculate exact population-level behavioral incidence rates taking into account survey weights and category midpoints, the following formula is applied:

  Incidence Rate (IR) = Σ_{(i=1 to n)} P_i C_i

  Standard Error (SE) = √[Σ C_i² × Var(P_i)]

  Where:
  P_i = the proportion of subjects responding at level i of the behavioral category.
  C_i = the assigned frequency value of behavior at level i (using the midpoint for categorical ranges, e.g., 2.5 for “2 to 3 days”, 4.5 for “4 to 5 days”, 7.5 for “6 to 9 days”, etc.).
  Var(P_i) = the sampling variance of proportion P_i derived from complex survey design algorithms (e.g., Taylor series linearization or balanced repeated replications).

11. Permissions & Fee and Test Year

The Youth Risk Behavior Survey (YRBS) Weapon Carrying Module was developed and refined by the Centers for Disease Control and Prevention (CDC) beginning with the initial national survey implementation in 1990 and 1991. The extended NYC Youth Violence Survey adaptation items (specifically Items 3, 4, 5, and 6) were developed in 1993 through the Division of Adolescent and School Health (DASH), Center for Chronic Disease Prevention and Health Promotion, CDC, in partnership with the NYC DOHMH. The compendium documentation was formally codified in the public health assessment volume Measuring Violence-Related Attitudes, Behaviors, and Influences Among Youths: A Compendium of Assessment Tools (Dahlberg et al., 1998, 2005).

Licensing and Fee Structure: The scale resides entirely in the public domain as a work prepared by officers and employees of the United States Federal Government and collaborating municipal agencies as part of official public duties. There are no licensing fees, royalties, or formal access charges required for educational, epidemiological, clinical, or research use. Researchers and organizations may freely administer, adapt, and electronically deploy the module. Citation of the Centers for Disease Control and Prevention and the New York City Department of Health and Mental Hygiene is required in academic and institutional publications.

12. References

• Brener, N. D., Collins, J. L., Kann, L., Warren, C. W., & Williams, B. I. (1995). Reliability of the Youth Risk Behavior Survey questionnaire. American Journal of Epidemiology, 141(6), 575–580. https://doi.org/10.1093/oxfordjournals.aje.a117473
• Brener, N. D., Kann, L., McManus, T., Kinchen, S. A., Sundberg, E. C., & Ross, J. G. (2002). Reliability of the 1999 Youth Risk Behavior Survey questionnaire. Journal of Adolescent Health, 31(4), 336–342. https://doi.org/10.1016/S1054-139X(02)00339-7
• Centers for Disease Control and Prevention. (1993). New York City Youth Violence Survey. Atlanta, GA: U.S. Department of Health and Human Services, CDC, Division of Adolescent and School Health.
• Dahlberg, L. L., Toal, S. B., Swahn, M., & Behrens, C. B. (2005). Measuring Violence-Related Attitudes, Behaviors, and Influences Among Youths: A Compendium of Assessment Tools (2nd ed., pp. 267–269). Centers for Disease Control and Prevention, National Center for Injury Prevention and Control. https://www.cdc.gov/violenceprevention/pdf/YV_Compendium.pdf
• Kann, L., McManus, T., Harris, W. A., Shanklin, S. L., Flint, K. H., Queen, B., Lowry, R., Chyen, D., Whittle, L., Thornton, J., Lim, C., Bradford, D., Yamakawa, Y., Leon, M., Brener, N., & Ethier, K. A. (2018). Youth Risk Behavior Surveillance — United States, 2017. MMWR Surveillance Summaries, 67(8), 1–114. https://doi.org/10.15585/mmwr.ss6708a1
• Lowry, R., Powell, K. E., Kann, L., Collins, J. L., & Kolbe, L. J. (1998). Weapon-carrying, physical fighting, and fight-related injury among U.S. adolescents. American Journal of Preventive Medicine, 14(3), 195–200. https://doi.org/10.1016/S0749-3797(97)00038-0
• Orpinas, P., & Frankowski, R. (2001). The Aggression Scale: A self-report measure of aggressive behavior for young adolescents. Journal of Early Adolescence, 21(1), 50–67. https://doi.org/10.1177/0272431601021001003
• Simon, T. R., Crosby, A. E., & Dahlberg, L. L. (1999). Students who carry weapons to high school: Comparison of characteristics by weapon type. Journal of Adolescent Health, 24(5), 340–348. https://doi.org/10.1016/S1054-139X(98)00128-1

13. Items of the Scale (Questionnaire)