Disruptive Behaviour Disorder Rating Scale (DBDRS)

1. Abstract

The Disruptive Behaviour Disorder Rating Scale (DBDRS), originally conceptualized and validated by William E. Pelham, Jr. and colleagues (1992), is an extensively utilized, standardized psychometric screening and diagnostic aid designed to quantify externalizing behavioral symptoms in children and adolescents aged 5 to 18 years. Developed directly from the operationalized criteria of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (spanning DSM-III-R, DSM-IV, and DSM-5 symptom formulations), the DBDRS bridges the dimensional measurement of behavioral frequency with categorical diagnostic algorithms. The instrument captures four clinically correlated yet distinct externalizing syndromes across 45 items: Attention-Deficit/Hyperactivity Disorder Predominantly Inattentive Presentation (ADHD-IN; 9 items), ADHD Predominantly Hyperactive-Impulsive Presentation (ADHD-HI; 9 items), Oppositional Defiant Disorder (ODD; 8 items), and Conduct Disorder (CD; 19 items inclusive of adolescent-onset aggressive, delinquent, and rule-violating behaviors). Items are rated on a four-point Likert-type severity metric ranging from 0 (Not at all) to 3 (Very much), alongside an optional non-scored informant category for “don’t know” responses, often utilized in teacher reports.

Extensive psychometric investigations have established robust reliability and validity across multiple international socio-cultural contexts. Internal consistency indices are consistently exemplary, with Cronbach’s alpha coefficients commonly reaching or exceeding .95 for ADHD-Inattention, .95 for ADHD-Hyperactivity/Impulsivity, .95 for Oppositional Defiant Disorder, and between .81 and .88 for Conduct Disorder. Construct and criterion validity have been substantiated through structural equation modeling, exploratory and confirmatory factor analyses, and rigorous multi-informant receiver operating characteristic (ROC) curves. Factor analytic evaluations reveal distinct, empirically robust latent structures distinguishing inattention, hyperactivity/impulsivity, and hostile-oppositional behaviors, while demonstrating nuanced covariation patterns between severe conduct pathology and oppositional defiant clusters. Dual-scoring mechanisms permit both dimensional symptom severity tracking—vital for evaluating pharmacological, behavioral, and school-based interventions—and categorical threshold scoring based on DSM symptom counts (endorsed as 2 or 3). The DBDRS represents an open-access, public-domain gold standard for pediatric behavioral assessment across clinical, epidemiological, and educational environments.

2. Keywords

Disruptive Behaviour Disorder Rating Scale, DBDRS, Attention-Deficit/Hyperactivity Disorder, ADHD, Oppositional Defiant Disorder, Conduct Disorder, externalizing child psychopathology, behavioral assessment, psychometrics, William E. Pelham

3. Authors

The Disruptive Behaviour Disorder Rating Scale was developed by William E. Pelham, Jr., Ph.D., ABPP, in collaboration with Elizabeth M. Gnagy, M.A., Kimberly E. Greenslade, Ph.D., and Richard Milich, Ph.D.

• William E. Pelham, Jr., Ph.D. (1948–2023): A seminal figure in clinical child and adolescent psychology, Dr. Pelham served as Distinguished Professor of Psychology and Psychiatry, Director of the Center for Children and Families (CCF), and Chair of the Department of Psychology at Florida International University (FIU). Formerly on the faculties of the State University of New York (SUNY) at Buffalo, the University of Pittsburgh School of Medicine, and Florida State University, Dr. Pelham authored hundreds of peer-reviewed empirical investigations on pharmacological and behavioral interventions for pediatric externalizing psychopathology.
• Elizabeth M. Gnagy, M.A.: Senior Research Associate and Project Director at the Center for Children and Families, Florida International University, Miami, Florida, USA. Ms. Gnagy has directed multiple large-scale randomized clinical trials funded by the National Institute of Mental Health (NIMH), specializing in trial design, multi-informant assessment methodologies, and longitudinal behavioral tracking.
• Kimberly E. Greenslade, Ph.D.: Clinical Child Psychologist and researcher previously affiliated with the Department of Psychiatry at the University of Pittsburgh School of Medicine and Western Psychiatric Institute and Clinic (WPIC), Pittsburgh, Pennsylvania, USA.
• Richard Milich, Ph.D.: Provost’s Distinguished Service Professor Emeritus of Psychology at the University of Kentucky, Lexington, Kentucky, USA. Dr. Milich is an internationally recognized expert on attentional mechanisms, developmental psychopathology, and the behavioral manifestation of ADHD subtypes in child populations.

4. Purpose

The fundamental clinical and scientific purpose of the Disruptive Behaviour Disorder Rating Scale (DBDRS) is to provide an empirically grounded, psychometrically rigorous, and diagnostically congruent measurement instrument that systematically evaluates the core behavioral criteria of disruptive behavior disorders in youth. Prior to the formal standardization of the DBDRS, clinical child assessment heavily relied either on broad-band socio-emotional rating batteries—such as the Child Behavior Checklist (CBCL) or the Behavior Assessment System for Children (BASC)—or early narrow-band measures like the SNAP (Swanson, Nolan, and Pelham) Rating Scale. While broad-band measures provide broad syndromal profiles (internalizing vs. externalizing behaviors), they often lack one-to-one correspondence with the explicit criterion sets established in categorical nosological taxonomies like the DSM. Conversely, early narrow-band scales focused predominantly on the attentional and motoric domains of Attention-Deficit Disorder without systematically integrating comorbid oppositional and conduct pathology within an identical metric format.

The DBDRS was expressly engineered to address these methodological gaps. It was formulated to reflect changes within diagnostic nomenclature—initially mapping to the DSM-III-R and subsequently harmonized with DSM-IV and DSM-5 diagnostic frameworks—allowing clinicians and researchers to capture the three paramount childhood externalizing disorders concurrently: ADHD, ODD, and CD. In clinical practice, childhood externalizing conditions rarely present in isolation; epidemiological studies demonstrate that approximately 40% to 60% of youth with ADHD exhibit comorbid ODD, and a substantial proportion of those with early-onset ODD escalate into severe Conduct Disorder. By embedding these interrelated diagnostic categories within a singular, efficient rating format, the DBDRS eliminates the necessity of administering separate, disconnected questionnaires, thereby minimizing informant burden for parents, primary caregivers, and classroom teachers.

In educational and psychiatric settings, the DBDRS serves multiple critical roles:

• Diagnostic Clarification: It provides a dual-scoring mechanism whereby clinicians can track dimensional severity (continuous symptom scale totals) while concurrently tabulating categorical diagnostic thresholds (the exact count of developmentally inappropriate symptoms endorsed at moderate-to-severe intensities).
• Multi-Informant Behavioral Reconciliation: Because the scale provides parallel Parent and Teacher Rating Forms, clinicians can contrast cross-situational variations. The pervasive nature of ADHD can be verified across both home and school ecologies, while setting-specific manifestations of ODD (e.g., oppositional defiance manifested primarily against parents versus defiance directed toward teachers) or covert CD behaviors can be identified.
• Treatment Baseline and Outcome Monitoring: The 4-point response metric is sensitive to behavioral changes induced by pharmacological therapies (such as psychostimulant titration protocols), behavioral parent training (BPT), classroom contingency management systems, and cognitive-behavioral interventions. Clinicians can administer the DBDRS periodically throughout the treatment trajectory to detect functional symptom attenuation or intervention resistance.
• Epidemiological and Clinical Trials Research: The DBDRS is widely implemented in clinical research protocols funded by organizations such as the National Institutes of Health (NIH) as a validated outcome measurement index, facilitating cross-study comparability across pediatric psychopharmacological and psychosocial intervention trials.

5. Psychological Construct

The psychological constructs measured by the DBDRS comprise the triad of disruptive behavior disorders specified within modern psychiatric taxonomy: Attention-Deficit/Hyperactivity Disorder (bifurcated into Inattention and Hyperactivity/Impulsivity), Oppositional Defiant Disorder, and Conduct Disorder. Each dimension reflects distinct psychological, cognitive, and neurodevelopmental etiologies, yet they interact dynamically across childhood development.

Attention-Deficit/Hyperactivity Disorder: Inattention (ADHD-IN)

The ADHD-IN construct reflects chronic, developmentally aberrant deficits in executive functioning, working memory, vigilance, selective attention, and goal-directed cognitive persistence. Within the DBDRS framework, this dimension is operationalized across 9 standardized items that measure the manifestation of executive dysregulation in daily academic, recreational, and occupational contexts. Rather than capturing passive daydreaming, these items focus on functional disruptions:

• Sustained Cognitive Effort Deficits: Difficulty sustaining attention in tasks, avoidance of tasks demanding protracted mental exertion (e.g., structured schoolwork or extensive domestic assignments), and vulnerability to extraneous auditory or visual distractors.
• Executive Disorganization: Failures in task sequencing, organizational chaos in daily activities, losing necessary items (materials, pencils, books), and pervasive forgetfulness in daily routines.
• Failure of Attentional Allocation: Careless errors resulting from inattention to operational details and perceived inability to listen attentively when addressed directly.

Attention-Deficit/Hyperactivity Disorder: Hyperactivity/Impulsivity (ADHD-HI)

The ADHD-HI construct embodies underlying neurological disruptions in behavioral inhibition, motoric regulation, and delay of gratification. In the DBDRS, this domain is indexed via 9 specific behavioral markers divided between gross motor agitation and inhibitory control failure:

• Motoric Excess: Fine motor restlessness (fidgeting with hands or feet, squirming in seat), gross motor restlessness (inappropriately leaving assigned seating in classroom contexts, running or climbing excessively in prohibited environments), subjective or objective feelings of being “on the go” or driven by an internal motor, and inability to engage in leisure activities quietly.
• Impulsivity and Delay Aversion: Verbal disinhibition (talking excessively, blurting out answers precipitously before questions are finalized), social-interactive impulsivity (inability to await one’s turn in games or queues), and behavioral intrusiveness (interrupting or butting into ongoing conversations or peer activities).

Oppositional Defiant Disorder (ODD)

The ODD construct captures a persistent, recurrent pattern of angry, irritable mood, argumentative/defiant behavior, and vindictiveness that goes beyond normal developmental exploration. Unlike normative developmental autonomy-seeking, the 8 items measuring ODD on the DBDRS identify socio-emotional dysregulation and interpersonal hostility:

• Negative Affectivity and Emotional Reactivity: Frequent loss of emotional temper, being easily annoyed or touchy in response to peer or adult actions, and sustained anger, bitterness, or resentment.
• Interpersonal Defiance and Noncompliance: Actively refusing to adhere to adult rules or regulatory requests, persistently arguing with authority figures, deliberately performing actions calculated to annoy others, and projecting blame for one’s personal misbehavior or operational blunders onto peers or family members.
• Vindictiveness: Spiteful or malicious interpersonal reactions occurring across repeated interactions over a minimum six-month temporal arc.

Conduct Disorder (CD)

The Conduct Disorder construct encompasses a repetitive and persistent pattern of behavior in which the basic rights of others or major age-appropriate societal norms or rules are systematically violated. Within the DBDRS, CD is measured across items addressing four primary phenotypic domains:

• Aggression to People and Animals: Physical intimidation and bullying, initiation of physical combat, weapon usage (e.g., bricks, broken bottles, knives), physical cruelty directed toward human beings, physical cruelty inflicted upon animals, confrontational theft (e.g., mugging, armed robbery), and coerced sexual activity.
• Destruction of Property: Deliberate arson intended to cause catastrophic damage, and proactive destruction of property belonging to others (e.g., breaking windows, malicious vandalism).
• Deceitfulness or Theft: Breaking and entering into residential structures, vehicles, or private facilities; frequent lying and “conning” to secure unearned privileges or evade commitments; and non-confrontational theft of non-trivial value (e.g., retail shoplifting, check or document forgery).
• Serious Violations of Rules: Nocturnal rule violations (staying out late despite strict parental prohibitions prior to age 13), running away from the familial home overnight on repeated occasions, and chronic school truancy initiated prior to age 13.

6. Theoretical Framework

The conceptual architecture of the Disruptive Behaviour Disorder Rating Scale is deeply embedded within Developmental Psychopathology and Behavioral Assessment Theory. Developmental psychopathology, spearheaded by theorists such as Dante Cicchetti, L. Alan Sroufe, and Thomas Achenbach, posits that atypical childhood behaviors must be contextualized relative to normative developmental trajectories, environmental adaptiveness, and developmental cascades. Under this model, disruptive behavior disorders are not static biological lesions, but rather dynamic, transactional phenotypes that emerge from reciprocal interactions between neurobiological vulnerabilities and socializing environments.

Specifically, the theoretical foundation of the DBDRS draws upon three dominant models:

• Barkley’s Unified Theory of Behavioral Inhibition and Executive Function: Formulated by Russell A. Barkley, this neuropsychological framework conceptualizes ADHD not as a primary disorder of attention, but as a fundamental deficit in behavioral inhibition. Behavioral inhibition provides the critical delay necessary for four executive functions to operate: working memory, self-regulation of affect/motivation/arousal, internalization of speech, and reconstitution (analysis and synthesis of behavior). When behavioral inhibition fails, the hyperactive, impulsive, and disorganized inattentive manifestations captured across the first 18 items of the DBDRS inevitably manifest in external, unstructured environments.
• Patterson’s Coercive Family Process Model: Developed by Gerald R. Patterson and colleagues at the Oregon Social Learning Center, this interactional theory delineates the developmental pathway from early difficult temperament to ODD and subsequent Conduct Disorder. Patterson demonstrated that oppositional behaviors are reinforced through negative reinforcement cycles: when a child displays intense noncompliance or emotional outbursts, caregivers often withdraw demands to terminate immediate conflict. This unintended reinforcement solidifies coercive behavioral repertoires. The DBDRS directly indexes these coercive exchanges (e.g., arguments with adults, defiance of rules, blaming others).
• Loeber’s Developmental Pathways Model: Rolf Loeber’s longitudinal research established that externalizing psychopathology progresses along three distinct, non-mutually exclusive trajectories: an Overt Pathway (progressing from minor aggression such as bullying, to physical fighting, to severe violence), a Covert Pathway (progressing from minor covert acts like lying and shoplifting, to property damage, to serious delinquency like burglary), and an Authority Conflict Pathway (progressing from stubbornness, to active defiance, to authority avoidance like truancy and running away). The item distribution of the DBDRS directly operationalizes each branch of Loeber’s pathways, allowing clinicians to trace where a youth falls along this developmental continuum.

7. Validity

The DBDRS has been evaluated across extensive psychometric validation paradigms, establishing high construct, criterion, convergent, and discriminant validity across diverse developmental cohorts and clinical populations.

Construct and Structural Validity

Construct validity was initially confirmed in Pelham et al.’s (1992) foundational validation investigation involving a normative sample of 931 primary school-aged boys (ages 5–14 years) evaluated by classroom teachers. Factor analytic models demonstrated that items mapped onto the theoretically hypothesized diagnostic clusters with high precision. Further cross-national validations, such as those conducted by Loona and Kamal (2011) in Pakistan, Bzhalava and Inasaridze (2017) in Georgia, and Ofovwe and Ofovwe (2010) in Nigeria, confirmed that the multidimensional construct of disruptive behaviors retains structural stability across diverse cultural contexts, displaying stable factor configurations across varying pedagogical and familial structures.

Criterion-Related and Predictive Validity

Criterion validity has been substantiated through clinical diagnostic interviews, direct behavioral observations, and conditional probability modeling. In the original Pelham et al. (1992) investigation, conditional probability analyses revealed nuanced predictive dynamics across subscales:

• ADHD Predictability: While single isolated symptoms of ADHD demonstrated moderate positive predictive power due to the relative commonality of minor motoric or attentional lapses in young children, specific symptom combinations from both the Inattention and Hyperactivity/Impulsivity dimensions yielded excellent positive predictive value (exceeding .85 to .90) for diagnosing formal ADHD.
• ODD Predictability: Endorsement of multiple ODD items exhibited very high predictive power for categorical clinical diagnosis, indicating that severe oppositional-defiant behavior in school settings rarely represents normative developmental variance.
• CD Sensitivity and Informant Specificity: The predictive power of teacher-completed CD scales was constrained by high rates of “don’t know” responses, reflecting the covert, non-classroom nature of delinquency (e.g., breaking and entering, running away, fire setting). Consequently, construct validation confirmed that parent ratings demonstrate far superior predictive and criterion validity for covert Conduct Disorder symptoms, while teacher ratings provide superior validity for school-based ADHD and direct teacher-defiance items.

Convergent and Discriminant Validity

Convergent validity has been established by correlating DBDRS subscale scores against established gold-standard child psychopathology instruments:

• DBDRS ADHD Inattention and Hyperactivity subscales exhibit strong convergent correlations ($r = .75$ to $.88$) with the Inattention and Hyperactivity-Impulsivity subscales of the Conners Rating Scales (CRS-R / Conners 3) and the Vanderbilt ADHD Diagnostic Rating Scale (VADRS).
• The ODD and CD subscales correlate significantly ($r = .68$ to $.82$) with the Externalizing Problems broadband scale, the Rule-Breaking Behavior scale, and the Aggressive Behavior scale of the Child Behavior Checklist (CBCL) and Teacher Report Form (TRF).
• Discriminant validity is verified by low-to-negligible correlations ($r = .10$ to $.25$) between DBDRS externalizing dimensions and standardized scales measuring internalizing constructs, such as the Multidimensional Anxiety Scale for Children (MASC) and the Children’s Depression Inventory (CDI), indicating that the scale cleanly isolates disruptive behavioral problems from internalizing distress.

8. Reliability

The DBDRS demonstrates robust internal consistency, strong inter-rater concordance within similar environmental settings, and high test-retest stability across empirical investigations.

Internal Consistency

Extensive field trials across clinical and non-clinical cohorts demonstrate exceptional internal consistency for the primary subscales:

• ADHD – Inattention: Cronbach’s alpha coefficients consistently range from $\alpha = .93$ to $.96$ across both parent and teacher versions, reflecting high item homogeneity.
• ADHD – Hyperactivity/Impulsivity: Cronbach’s alpha coefficients consistently range from $\alpha = .92$ to $.95$, confirming that motoric and verbal disinhibition markers reliably capture a unified latent trait.
• Oppositional Defiant Disorder: Demonstrates internal consistency estimates between $\alpha = .91$ and $.95$, indicating high coherence among items assessing hostility, negative affect, and defiance.
• Conduct Disorder: Alpha coefficients generally range from $\alpha = .81$ to $.88$. The slightly lower alpha relative to the other subscales reflects the low base rate of severe antisocial behaviors in the general population, the episodic nature of delinquent acts, and the behavioral diversity between aggressive, property-destroying, and covert rule-breaking domains.

Test-Retest Stability

Investigations assessing temporal stability across intervals spanning two to four weeks demonstrate test-retest correlation coefficients ($r_{tt}$) ranging between $.78$ and $.89$ for ADHD subscales, $.74$ and $.85$ for ODD subscales, and $.68$ and $.82$ for CD subscales. Over longer intervals (e.g., three to six months without targeted intervention), stability coefficients remain high ($r > .70$), demonstrating that the DBDRS captures enduring behavioral syndromes rather than transient mood states.

Inter-Rater Reliability

Inter-rater agreement between independent observers within the same environmental ecological niche (e.g., mother-father concordance, or two primary classroom teachers co-teaching a single cohort) is robust, with intraclass correlation coefficients (ICC) ranging between $.70$ and $.84$. Concordance between informants across different environmental settings (e.g., cross-informant parent-teacher correlations) is more modest, typically ranging from $r = .35$ to $.55$. Rather than psychometric deficiency, this cross-informant divergence reflects genuine, ecologically driven behavioral variability, highlighting how externalizing symptoms shift across structured classroom settings versus less structured home environments.

9. Factor Analysis

The underlying dimensionality of the Disruptive Behaviour Disorder Rating Scale has been rigorously examined using Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) across diverse international cohorts.

Exploratory Factor Analytic Findings

In the seminal psychometric work by Pelham et al. (1992), an exploratory factor analysis using principal axis factoring with varimax rotation was executed on teacher ratings of 931 primary school children. The initial eigenvalue analysis and scree plot inspections converged on a distinct three-to-four factor solution:

• Factor 1 (Inattention): Composed entirely of the 9 ADHD Inattention items, exhibiting high, clean factor loadings (generally $lambda > .70$) with minimal cross-loadings onto motoric or oppositional axes.
• Factor 2 (Hyperactivity/Impulsivity): Encompassed the 9 ADHD Hyperactivity and Impulsivity items (loadings ranging from $lambda = .65$ to $.82$), isolating motor agitation and verbal disinhibition.
• Factor 3 (Oppositional Defiance and Overt Conduct Problems): Encompassed the 8 ODD items alongside several overt, non-covert CD items (e.g., initiating fights, bullying). In this teacher-based elementary school sample, overt aggression and oppositional defiance exhibited substantial covariation, collapsing onto an unified confrontational factor.
• Factor 4 (Covert Conduct Delinquency): Identified primarily in parent ratings and adolescent cohorts, this latent dimension captured covert delinquent acts, including theft, property destruction, truancy, and substance usage.

Confirmatory Factor Analysis and Structural Equation Modeling

Subsequent modern CFA studies evaluating DSM-IV and DSM-5 configurations have explicitly tested alternative structural models:

• One-Factor General Externalizing Model: Pitting all items against a single externalizing dimension; consistently yields poor fit across all conventional indices (RMSEA > .12, CFI < .80).
• Two-Factor Model (ADHD vs. ODD/CD): Distinguishing attentional/motor disorders from disruptive conduct; demonstrates improved fit but continues to manifest substantial parameter strain.
• Three-Factor Model (ADHD Inattention, ADHD Hyperactivity/Impulsivity, and ODD/CD): Provides acceptable model fit, particularly in early childhood samples where ODD and CD manifestations are closely intertwined.
• Four-Factor Correlated Latent Model (Inattention, Hyperactivity/Impulsivity, ODD, and CD): Consistently demonstrates superior global fit indices across large multi-site clinical and normative samples. Typical goodness-of-fit parameters for this four-factor correlated specification are:
  • Comparative Fit Index (CFI) $ge .94$
  • Tucker-Lewis Index (TLI) $ge .93$
  • Root Mean Square Error of Approximation (RMSEA) $le .055$ (90% CI: .050–.061)
  • Standardized Root Mean Square Residual (SRMR) $le .048$
• Bifactor Latent Models: Advanced bifactor modeling indicates the presence of a strong general externalizing factor ($g$-Externalizing) alongside robust specific group factors representing Inattention, Hyperactivity, and Defiance, supporting both aggregate externalizing severity scores and distinct subscale interpretation.

10. Instrument / Measurement Tool

• Full Instrument Name: Disruptive Behaviour Disorder Rating Scale (DBDRS)
• Alternative / Related Designations: Pelham DBD Rating Scale; Disruptive Behavior Disorders Parent and Teacher Rating Scale
• Target Population: Children and adolescents aged 5 through 18 years
• Primary Informants: Parents / primary caregivers (Home Form) and classroom teachers / educators (School Form)
• Administration Format: Standard paper-and-pencil questionnaire, or computerized / online psychometric assessment platform
• Administration Time: Approximately 8 to 12 minutes
• Total Item Count: 45 items (capturing DSM ADHD, ODD, and CD symptom manifestations, alongside expanded adolescent delinquent items)
• Response Format: 4-point Likert-type scale scored as:
  • 0 = Not at all
  • 1 = Just a little
  • 2 = Pretty much
  • 3 = Very much

  *(Note: Teacher forms often include an additional non-scored “Don’t Know” checkbox to prevent guessing on unobserved behaviors).*

• Subscale Composition:
  • ADHD – Inattention (9 items): Items 1, 5, 9, 13, 17, 21, 25, 29, 33
  • ADHD – Hyperactivity/Impulsivity (9 items): Items 3, 7, 11, 15, 19, 23, 27, 31, 35
  • Oppositional Defiant Disorder (8 items): Items 2, 6, 10, 14, 18, 22, 26, 30
  • Conduct Disorder (19 items): Items 4, 8, 12, 16, 20, 24, 28, 32, 34, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45
• Scoring Methodologies:
  • Dimensional Severity Scoring: Item responses within each subscale are summed to generate continuous raw scores (or averaged to produce mean item scores from 0.0 to 3.0). Higher scores reflect greater functional impairment and symptom severity. Raw scores can be referenced against standardized age- and gender-stratified percentile norms.
  • Categorical Diagnostic Threshold Scoring: Items rated as either 2 (“Pretty much”) or 3 (“Very much”) are counted as symptomatic criteria met for DSM diagnostic screening purposes:
  • ADHD – Inattention: Requires $ge 6$ of 9 inattentive items endorsed at level 2 or 3 (or $ge 5$ items for adolescents aged 17 and older under DSM-5 criteria).
  • ADHD – Hyperactivity/Impulsivity: Requires $ge 6$ of 9 hyperactive/impulsive items endorsed at level 2 or 3 (or $ge 5$ items for older adolescents).
  • Combined ADHD: Meets criteria for both Inattentive and Hyperactive/Impulsive subscales.
  • Oppositional Defiant Disorder: Requires $ge 4$ of 8 ODD items endorsed at level 2 or 3.
  • Conduct Disorder: Requires $ge 3$ of the core CD items endorsed as present (level 2 or 3) within the designated temporal frame (minimum 12 months, with at least 1 present in the past 6 months).

11. Permissions & Fee and Test Year

• Original Publication Year: 1992 (with subsequent adaptations published alongside DSM-IV in 1997/1998, and DSM-5 harmonization protocols in 2013).
• Copyright & Intellectual Property: William E. Pelham, Jr., Ph.D., and co-authors. The tool was developed through federally funded research and intentionally released to the academic, psychiatric, and school mental health communities without commercial restriction.
• Accessibility and Licensing Fee: Free download and unrestricted public-domain usage for academic, clinical, and non-commercial research purposes. No licensing fees or per-use royalties are required. Permission from the authors is not required to reproduce or implement the rating scale in clinical practice, school districts, or scientific research protocols.
• Distribution Repositories: Readily available through open-access clinical repositories, including the Center for School Mental Health (University of Maryland School of Medicine), the Center for Children and Families at Florida International University, and academic research platforms.

12. References

• Achenbach, T. M. (1991). Manual for the Youth Self-Report and 1991 Profile. Department of Psychiatry, University of Vermont.
• Barkley, R. A. (1997). Behavioral inhibition, sustained attention, and executive functions: Constructing a unifying theory of ADHD. Psychological Bulletin, 121(1), 65–94. https://doi.org/10.1037/0033-2909.121.1.65
• Bzhalava, V., & Inasaridze, K. (2017). Disruptive Behavior Disorder (DBD) Rating Scale for Georgian population. arXiv preprint arXiv:1702.03409. https://doi.org/10.48550/arXiv.1702.03409
• Loeber, R., Green, S. M., Lahey, B. B., Frick, P. J., & McBurnett, K. (2000). Oppositional defiant disorder and conduct disorder. In M. Hersen & R. T. Ammerman (Eds.), Advanced Abnormal Child Psychology (2nd ed., pp. 361–388). Lawrence Erlbaum Associates.
• Loona, M. I., & Kamal, A. (2011). Translation and adaptation of Disruptive Behaviour Disorder Rating Scale. Pakistan Journal of Psychological Research, 26(2), 149–165.
• Ofovwe, G. E., & Ofovwe, C. E. (2010). Disruptive Behaviour Disorder (DBD) Rating Scale for Attention Deficit/Hyperactivity Disorder: Normative values and percentile charts for Nigerian children aged 6 to 15 years. Nigerian Hospital Practice, 6(1–2), 11–18.
• Patterson, G. R. (1982). Coercive Family Process. Castalia Publishing Company.
• Pelham, W. E., Jr., Fabiano, G. A., & Massetti, G. M. (2005). Evidence-based assessment of attention deficit hyperactivity disorder in children and adolescents. Journal of Clinical Child and Adolescent Psychology, 34(3), 449–476. https://doi.org/10.1207/s15374424jccp3403_5
• Pelham, W. E., Jr., Gnagy, E. M., Greenslade, K. E., & Milich, R. (1992). Teacher ratings of DSM-III-R symptoms for the disruptive behavior disorders. Journal of the American Academy of Child & Adolescent Psychiatry, 31(2), 210–218. https://doi.org/10.1097/00004583-199203000-00006
• Swanson, J. M. (1992). School-based Assessments and Interventions for ADD Students. K.C. Publishing.

13. Items of the Scale (Questionnaire)