The Conners’ Teacher Rating Scale \u2013 Revised (CTRS-R)<\/strong> is an internationally recognized, standardized behavioral assessment instrument developed by C. Keith Conners<\/a> to evaluate externalizing and internalizing behavioral difficulties, academic problems, and symptoms of attention-deficit\/hyperactivity disorder (ADHD<\/a>) in school-aged children and adolescents aged 3 to 17 years. Published by Multi-Health Systems (MHS)<\/a> in 1997 and 1998, the CTRS-R represents an extensive empirical and psychometric overhaul of the earlier Conners Teacher Rating Scales (CTRS-39 and CTRS-28) to ensure rigorous structural alignment with the diagnostic criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV)<\/a>.<\/p>\n The CTRS-R comprises three distinct versions designed for classroom administration: the comprehensive long form (CTRS-R:L<\/strong>, consisting of 59 items), the short form (CTRS-R:S<\/strong>, consisting of 28 items), and the 10-item Abbreviated Teacher Rating Scale (often designated as the Conners Global Index – Teacher or CGI-T). Teachers evaluate specific observable behaviors displayed by students over the preceding month on a four-point Likert-type scale ranging from 0 (“Not True at all \/ Never, Seldom”) to 3 (“Very much True \/ Very Often, Very Frequent”).<\/p>\n Empirical factor analytic studies substantiate a robust, multidimensional latent structure across the full instrument, delineating empirical subscales that include: (a) Cognitive Problems \/ Inattention<\/em>, (b) Oppositional<\/em>, (c) Hyperactivity-Impulsivity<\/em>, (d) Anxious-Shy<\/em>, (e) Perfectionism<\/em>, and (f) Social Problems<\/em>, accompanied by specialized diagnostic indices such as the DSM-IV Symptoms Scales (DSM-IV Inattentive, DSM-IV Hyperactive-Impulsive, and DSM-IV Total) and the Conners ADHD Index. Psychometric evaluations across diverse clinical and representative normative samples demonstrate exceptional reliability, yielding internal consistency coefficients (Cronbach’s alpha) spanning .88 to .95 for major externalizing domains, strong test-retest reliability across 6- to 8-week intervals (.70 to .90), and robust convergent validity against structured psychiatric interviews, direct classroom observations, and psychoeducational performance metrics. The CTRS-R serves as an indispensable tool within school psychology, child clinical neuropsychology, pediatric psychopharmacology, and multimodal treatment monitoring.<\/p>\n Conners Teacher Rating Scale-Revised, CTRS-R, ADHD assessment, teacher rating scales, psychometrics, pediatric behavioral assessment, Oppositional Defiant Disorder, cognitive problems, inattention, hyperactivity, school psychology, behavioral screening<\/p>\n The primary author and architect of the CTRS-R is C. Keith Conners, Ph.D.<\/strong> (1933\u20132017), an esteemed pioneer in the field of clinical child psychology, pediatric neuropsychology, and psychopharmacology. Dr. Conners served as Professor of Medical Psychology in the Department of Psychiatry and Behavioral Sciences at the Duke University School of Medicine<\/a> and Director of the Duke ADHD Program.<\/p>\n Key psychometric collaborators who co-authored the standard revision, standardization, and factor-analytic structural validation studies include:<\/p>\n Institutional affiliations for the standardization, normative sampling, and commercial distribution reside with Multi-Health Systems Inc. (MHS Assessments), P.O. Box 950, North Tonawanda, NY 14120 \/ 3770 Victoria Park Ave, Toronto, ON, M2H 3M6, Canada.<\/p>\n The primary purpose of the Conners’ Teacher Rating Scale \u2013 Revised is to provide standardized, quantitatively normative, and clinically sensitive measurements of classroom behavioral, cognitive, emotional, and social functioning in school settings. Because classroom environments impose sustained cognitive demands, require behavioral inhibition, enforce strict task organization, and necessitate collaborative peer interactions, teachers operate as uniquely situated informants. Unlike parents, who observe children within familial, unstructured, or dyadic home contexts, classroom educators observe children relative to a normative peer group of identical chronological age and developmental placement.<\/p>\n In clinical, neuropsychological, and pediatric practices, the CTRS-R fulfills several imperative functions:<\/p>\n The CTRS-R has served as an international gold standard in randomized controlled trials (RCTs<\/a>) of central nervous system stimulants (such as methylphenidate and amphetamine salts), non-stimulant medications (e.g., atomoxetine), and behavioral modification interventions. The scale demonstrates high sensitivity to treatment effects across brief temporal windows, enabling psychopharmacological researchers and pediatricians to titrate medication dosages, determine behavioral response curves, and track therapeutic maintenance or relapse systematically.<\/p>\n The CTRS-R is conceptualized as a multi-dimensional clinical rating instrument capturing externalizing, executive, emotional, and social disruptions within school environments. Factor analytic operationalization across large normative and clinical cohorts identifies several distinct behavioral dimensions:<\/p>\n This subscale measures functional neurocognitive disruptions directly interfering with academic task engagement, information processing, and working memory. Behaviors captured within this construct include disorganization, executive planning deficits, distractibility by extraneous sensory stimuli, failure to attend to details resulting in careless errors, poor sustained attention during mental tasks, forgetfulness regarding learned material, and academic underachievement in core subjects such as reading, spelling, and arithmetic. Exemplar items include: “Fails to give close attention to details or makes careless mistakes in schoolwork”<\/em> and “Has difficulty organizing tasks or activities.”<\/em><\/p>\n Reflecting externalizing non-compliance and hostility toward authority figures, this construct operationalizes overt resistance to school norms and adult directives. Children scoring high on this dimension display explosive and unpredictable temper outbursts, active refusal to follow classroom regulations, persistent arguing with educators, defiance, spitefulness, vindictiveness, and verbal belligerence (sassiness). Unlike pure executive attention failures, these behaviors involve active, intentional contravention of adult expectations. Exemplar items include: “Actively defies or refuses to comply with adults’ requests”<\/em> and “Spiteful or vindictive.”<\/em><\/p>\n This construct reflects pervasive psychomotor agitation, restlessness, and a profound failure of behavioral and verbal response inhibition. It captures behaviors such as leaving assigned seating during classroom instruction, excessive running, climbing, squirming, persistent motoric fidgeting with hands or feet, talking out of turn, blurting out answers prematurely, interrupting peer conversations or games, and an inability to participate quietly in group leisure activities. Highly elevated scores reflect children who operate as if “driven by a motor.” Exemplar items include: “Is always ‘on the go’ or acts as if driven by a motor”<\/em> and “Leaves seat in classroom or in other situations in which remaining seated is expected.”<\/em><\/p>\n Although predominantly an externalizing rating scale, the CTRS-R incorporates this internalizing dimension to evaluate emotional vulnerability, social inhibition, behavioral inhibition, and affective dysregulation. High scores indicate children who present as timid, easily frightened, overly sensitive to constructive educator feedback, prone to frequent crying, bashful, socially withdrawn, and possessing feelings that are easily hurt. Exemplar items include: “Timid, easily frightened”<\/em> and “Feelings easily hurt.”<\/em><\/p>\n This subscale assesses an obsessive-compulsive or rigid behavioral style characterized by inflexible cognitive adherence to rules, excessive neatness, hyper-focus on minute details, and compulsive checking of academic assignments. While sometimes mistaken for adaptive diligence, elevated scores often correlate with academic paralysis, slow task completion, and behavioral distress when environmental order is disturbed. Exemplar items include: “Everything must be just so”<\/em> and “Keeps checking things over and over.”<\/em><\/p>\n This dimension evaluates peer-group maladjustment, interpersonal isolation, and socio-emotional incompetence within peer networks. Children with elevated scores report having no friends, lack understanding of how to initiate or maintain peer relationships, are avoided or unaccepted by the peer group, and are consistently selected last during cooperative sports or group academic activities. Exemplar items include: “Appears to be unaccepted by group”<\/em> and “Does not know how to make friends.”<\/em><\/p>\n The revised scale also contains empirically validated composite subscales that map directly onto the 18 diagnostic criteria of DSM-IV ADHD: the DSM-IV Inattentive<\/strong> scale (9 items), the DSM-IV Hyperactive-Impulsive<\/strong> scale (9 items), and the DSM-IV Total<\/strong> scale (18 items). Additionally, the 12-item Conners ADHD Index<\/strong> comprises the single most predictive subset of items that differentiate clinical ADHD cohorts from typically developing matched controls, serving as a rapid, empirically robust probability screening metric.<\/p>\n The theoretical architecture of the CTRS-R rests upon developmental psychopathology, behavioral neurobiology, and contemporary models of executive functions<\/a>, most notably Russell A. Barkley’s<\/a> Unified Theory of ADHD and Behavioral Inhibition.<\/p>\n Barkley posited that the core neuropsychological deficit in ADHD (specifically the combined and hyperactive-impulsive subtypes) is not primarily an attention deficit, but a fundamental impairment in behavioral inhibition<\/strong>. Behavioral inhibition comprises three interrelated processes: (1) inhibition of the initial prepotent response to an event, (2) stopping an ongoing response or response pattern, thereby permitting a delay in decision-making, and (3) interference control (protection of self-directed executive actions from external interference). In Barkley’s model, behavioral inhibition provides the necessary temporal foundation for four executive neuropsychological abilities:<\/p>\n The items comprising the CTRS-R Cognitive Problems and Hyperactivity-Impulsivity subscales operationalize direct behavioral breakdowns in these systems. When classroom tasks require self-directed sustained attention, internalized speech, or delay of gratification, children lacking intact behavioral inhibition manifest observable disruptions: calling out, fidgeting, forgetting instructions, misplacing academic tools, and impulsively disengaging from non-preferred tasks.<\/p>\n The CTRS-R also aligns conceptually with Thomas M. Achenbach’s<\/a> empirically derived, dimensional taxonomy of child behavioral problems. Rather than viewing psychiatric disorders as categorical, all-or-none biological entities, Achenbach and Conners conceptualized child psychopathology along continuous dimensions representing statistical deviations from age- and sex-matched normative distributions. The CTRS-R reflects this dimensional paradigm by converting raw item ratings into standardized T-scores (mean = 50, standard deviation = 10), enabling clinicians to evaluate severity along a continuous gradient from typical adaptation to clinical deviance<\/span>.<\/p>\n The construct, criterion, convergent, discriminant, and predictive validity of the CTRS-R have been comprehensively evaluated across extensive normative and clinical cohorts.<\/p>\n The construct validity of the CTRS-R was established during the 1997\/1998 restandardization program conducted across the United States and Canada (Conners et al., 1998). Using a normative sample of 2,787 general classroom teachers evaluating children across grades K through 12, researchers conducted exploratory factor analyses (EFA) followed by confirmatory factor analyses (CFA) on split validation subsamples. The hypothesized multi-factor model demonstrated exceptional structural fit, confirming that Cognitive Problems, Oppositional behavior, Hyperactivity-Impulsivity, Anxious-Shy, Perfectionism, and Social Problems represent distinct, empirically separable latent domains rather than a single generalized disruptive behavioral factor.<\/p>\n Convergent validity has been established by correlating CTRS-R scales with established psychoeducational and psychological rating systems:<\/p>\n Discriminant validity is supported by the scale’s demonstrated capacity to differentiate cleanly between children diagnosed with ADHD, children with generalized learning disabilities, children with internalizing mood\/anxiety disorders, and non-referred classroom peers. The Conners ADHD Index demonstrates area under the curve (AUC-ROC<\/a>) values ranging from .86 to .93 in differentiating ADHD clinical cases from typical school cohorts.<\/p>\n Criterion validity is demonstrated by the CTRS-R’s sensitivity in predicting DSM-IV clinical diagnostic assignments established via independent structured diagnostic psychiatric interviews (e.g., the Diagnostic Interview Schedule for Children [DISC]). Elevated T-scores (> 65) on the DSM-IV Total subscale reliably predict independent multidisciplinary diagnoses of ADHD with sensitivity rates typically exceeding 80% and specificity rates exceeding 85%<\/span>.<\/p>\n The CTRS-R possesses robust psychometric reliability across internal consistency, test-retest stability, and inter-rater reliability metrics.<\/p>\n Extensive normative analyses reported by Conners, Sitarenios, Parker, and Epstein (1998) indicate excellent internal consistency across all primary subscales, with Cronbach’s alpha (\u03b1) values consistently exceeding standard psychometric thresholds across age brackets (ages 3\u20135, 6\u201311, and 12\u201317) and across biological sexes:<\/p>\n Temporal stability evaluations conducted across intervals ranging from 6 to 8 weeks yield test-retest correlation coefficients (r) between .72 and .90 among non-clinical student samples, demonstrating that teacher ratings capture enduring behavioral tendencies rather than transient behavioral fluctuations. When evaluating clinical cohorts receiving stable baseline conditions, stability coefficients remain high (r > .80), while showing immediate sensitivity to active clinical pharmacological manipulations<\/span>.<\/p>\n Inter-rater concordance between different educators observing the same student (e.g., primary classroom teacher versus secondary academic subject teacher or resource specialist) typically produces intraclass correlation coefficients (ICC) ranging between .50 and .70. This moderate-to-high concordance is typical in ecological multi-informant assessment, reflecting differences in academic task structure, subject difficulty, classroom management style, and behavioral expectations across instructional contexts.<\/p>\n The structural configuration of the CTRS-R is grounded in rigorous large-scale factor analytic methodologies described in the landmark restandardization publication (Conners et al., 1998). The normative sample (N = 2,787) was divided into derivation and cross-validation cohorts to execute an exploratory-to-confirmatory factor structural sequence<\/span>.<\/p>\n Initial exploratory factor analyses on the derivation sample utilized principal axis factoring followed by Promax (oblique) rotation, reflecting the theoretical expectation that disruptive behavioral dimensions in school children are correlated rather than orthogonal. Scree test evaluations and eigenvalues-greater-than-one criteria isolated six prominent latent factors accounting for the majority of common item variance:<\/p>\n Subsequent confirmatory factor analyses on the independent cross-validation sample demonstrated that the six-factor model exhibited superior goodness-of-fit compared to alternative unidimensional or two-factor externalizing\/internalizing structures. Key fit indices confirmed acceptable-to-excellent structural parameters:<\/p>\n These findings substantiate the empirical validity of calculating separate domain subscores, confirming that the CTRS-R measures distinct behavioral and affective manifestations in classroom settings.<\/p>\n The Conners’ Teacher Rating Scale \u2013 Revised is a paper-and-pencil or computerized questionnaire completed by teachers or school personnel who have had at least 6 to 8 weeks of direct instructional experience with the student.<\/p>\n The revised edition of the Conners Teacher Rating Scale was formally published in 1997<\/strong>, with full psychometric restandardization data appearing in peer-reviewed clinical literature in 1998<\/strong>. It succeeded earlier iterations published by Dr. C. Keith Conners in 1969, 1978, and 1989.<\/p>\n The Conners’ Teacher Rating Scale \u2013 Revised, along with its newer successor editions (such as the Conners 3rd Edition [Conners 3] and Conners 4th Edition [Conners 4]), is a proprietary, copyrighted psychological assessment instrument<\/strong> owned and distributed internationally by:<\/p>\n Multi-Health Systems Inc. (MHS Assessments)<\/strong> The CTRS-R is not in the public domain. Clinicians, school districts, and university researchers must purchase official assessment protocols, scoring templates, or digital administration credits from MHS. User qualification policies apply: purchasers must meet Level B<\/em> psychometric qualification standards (requiring an advanced degree in psychology, education, medicine, speech pathology, or related clinical fields with formal training in psychometric testing and test interpretation).<\/p>\n2. Keywords<\/h2>\n
3. Authors<\/h2>\n
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4. Purpose<\/h2>\n
Clinical and Diagnostic Applications<\/h3>\n
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Research Applications and Treatment Monitoring<\/h3>\n
5. Psychological Construct<\/h2>\n
Cognitive Problems \/ Inattention<\/h3>\n
Oppositional<\/h3>\n
Hyperactivity-Impulsivity<\/h3>\n
Anxious-Shy<\/h3>\n
Perfectionism<\/h3>\n
Social Problems<\/h3>\n
DSM-IV Symptom Scales and Conners ADHD Index<\/h3>\n
6. Theoretical Framework<\/h2>\n
Barkley’s Behavioral Inhibition and Self-Regulation Model<\/h3>\n
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Achenbach’s Hierarchical Quantitative Empiricism<\/h3>\n
7. Validity<\/h2>\n
Construct and Factorial Validity<\/h3>\n
Convergent and Discriminant Validity<\/h3>\n
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Criterion and Predictive Validity<\/h3>\n
8. Reliability<\/h2>\n
Internal Consistency<\/h3>\n
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Test-Retest Reliability<\/h3>\n
Inter-Rater Reliability<\/h3>\n
9. Factor Analysis<\/h2>\n
Exploratory Factor Analysis (EFA)<\/h3>\n
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Confirmatory Factor Analysis (CFA)<\/h3>\n
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10. Instrument \/ Measurement Tool<\/h2>\n
Scale Characteristics<\/h3>\n
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Scoring and Profile Interpretation<\/h3>\n
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11. Permissions, Fee, and Test Year<\/h2>\n
Copyright and Licensing<\/h3>\n
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\n Website: https:\/\/www.mhs.com<\/a>
\n Email: customerservice@mhs.com<\/p>\n<\/blockquote>\n12. References<\/h2>\n
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13. Items of the Scale (Questionnaire)<\/h2>\n