1. Abstract
The ADD-H: Comprehensive Teacher's Rating Scale (commonly known by the acronym ACTeRS) is a standardized, teacher-administered behavioral rating instrument designed to evaluate classroom manifestations of attention-deficit/hyperactivity disorder (ADHD) and associated behavioral difficulties in children from kindergarten through eighth grade (grades K–8). Originally developed by Rona L. Ullmann, Esther K. Sleator, and Robert L. Sprague, the ACTeRS was engineered to address a significant limitation in early behavioral screening instruments: the conflation of attentional deficits with motor hyperactivity. Comprising 24 items rated on a 5-point Likert scale (ranging from 1 = Almost never to 5 = Almost always), the instrument delineates behavioral adjustment across four empirically derived subscales: Attention (items 1–6), Hyperactivity (items 7–11), Social Skills (items 12–18), and Oppositional Behavior (items 19–24).
Normative scores are converted into percentile ranks stratified separately for boys and girls to account for documented sex differences in externalizing and internalizing manifestations within educational environments. A clinical diagnostic indicator for attention deficit disorder is traditionally identified when a student scores at or below the 10th percentile on the Attention subscale, irrespective of elevations on concurrent dimensions. Psychometric evaluations demonstrate strong internal consistency across dimensions, with Cronbach's alpha coefficients exceeding .85 and test-retest reliability estimates ranging between .78 and .82 across subscales over brief intervals. However, investigations into inter-rater reliability reveal moderate consistency across multiple educators (coefficients ranging from .51 for Social Skills to .73 for Hyperactivity), underscoring the vital importance of utilizing ACTeRS as part of a multi-informant, multi-method clinical assessment battery rather than an isolated diagnostic tool. This article provides a comprehensive psychometric review of the ACTeRS instrument, examining its theoretical architecture, psychometric validity, factor composition, administrative rules, and clinical utility.
2. Keywords
ACTeRS, ADD-H Comprehensive Teacher's Rating Scale, Attention Deficit Disorder, ADHD Assessment, Classroom Behavior Rating, Hyperactivity Subscale, Oppositional Behavior, School Psychometrics, Factor Analysis, Behavioral Screening
3. Authors
The primary developers responsible for the conceptualization, item construction, and empirical standardization of the ADD-H: Comprehensive Teacher's Rating Scale (ACTeRS) are:
- Rona L. Ullmann, M.Ed. — Institute for Child Behavior and Development, University of Illinois at Urbana-Champaign. Primary investigator focusing on behavioral assessment, psychoeducational diagnostics, and classroom behavioral observation paradigms.
- Esther K. Sleator, M.D. — Institute for Child Behavior and Development and Department of Pediatrics, University of Illinois at Urbana-Champaign. Pediatrician and clinical researcher renowned for pioneering psychopharmacological investigations of methylphenidate in hyperactive school children.
- Robert L. Sprague, Ph.D. — Professor Emeritus of Psychology and former Director of the Institute for Child Behavior and Development, University of Illinois at Urbana-Champaign. Prominent psychopharmacologist, psychometrician, and pioneer in the scientific evaluation of pharmacological and behavioral interventions for developmental disabilities and childhood psychiatric disorders.
4. Purpose
The primary clinical and psychoeducational purpose of the ACTeRS is to capture precise, ecologically valid teacher observations regarding childhood behavioral dysfunction within standard classroom learning environments. Accurate diagnosis of childhood attention-deficit/hyperactivity disorder requires cross-situational behavioral evidence obtained from observers who have sustained daily exposure to the child alongside a standardized peer comparison group. Because classroom teachers observe hundreds of age-matched children engaged in cognitively demanding, sedentary, and socially cooperative tasks, their ratings offer critical behavioral normative context that clinical office visits cannot replicate.
The ACTeRS was purposefully developed to resolve a critical psychometric shortcoming characteristic of early rating scales, such as the early iterations of the Conners' Teacher Rating Scales. In historical scales, items capturing gross motor agitation, verbal impulsivity, and cognitive distractibility were frequently collapsed into a unitary "hyperkinetic conduct" or general behavioral deviance index. This structural entanglement obscured the diagnostic picture for children exhibiting severe attentional difficulties without conspicuous motor agitation (historically classified as Attention Deficit Disorder without Hyperactivity under DSM-III, and currently recognized as ADHD predominantly inattentive presentation). The ACTeRS was intentionally designed with pure, isolated factors that cleanly separate sustained attention and executive follow-through from gross motor hyperactivity and disruptive classroom agitation.
Beyond initial identification and differential diagnosis, the ACTeRS serves as a rapid, sensitive monitoring tool for treatment response. Available in both traditional paper-and-pencil protocols and computerized tracking software, the scale enables school psychologists, developmental pediatricians, and clinical child psychologists to establish stable baseline ratings across multiple academic terms and systematically track changes induced by behavioral therapy or stimulant medications. Because the rating protocol comprises only 24 items, teachers can complete evaluations in under ten minutes, facilitating high completion compliance for repeated-measures longitudinal evaluation.
5. Psychological Construct
The ACTeRS operationalizes classroom behavior across four distinct yet clinically interrelated psychological constructs. Each dimension corresponds to specific domains of cognitive, executive, motoric, and interpersonal functioning essential for school adaptation:
Attention (Items 1–6)
The Attention subscale captures executive functioning, sustained cognitive focus, working memory for complex directives, and autonomous academic productivity. Uniquely on the ACTeRS, the Attention items are keyed in a positive direction, measuring adaptive academic competence rather than overt failure. Items such as "Works well independently," "Persists with task for reasonable amount of time," and "Completes assigned task" assess the child's capacity for self-regulated persistence in goal-directed educational activities. Deficits in this dimension reflect fundamental impairments in vigilance, selective attention, and goal maintenance, making this subscale the central diagnostic index for identifying inattention syndromes.
Hyperactivity (Items 7–11)
The Hyperactivity subscale directly assesses gross motor disinhibition, physical restlessness, and physiological overarousal. The five items—encompassing behaviors such as "Extremely restless, fidgety," "Out of seat without permission," and "Easily over-stimulated"—measure an inability to modulate motor output to match the sedentary expectations of a formal learning setting. This dimension reflects underlying biological disinhibition and excessive motor activation independent of cognitive attention.
Social Skills (Items 12–18)
The Social Skills dimension captures interpersonal functioning, peer acceptance, social cue processing, and emotional liability during peer interactions. Reflecting both positive affiliation ("Gets along well with other children") and severe peer relational difficulties ("Unpopular with peers," "Teases others," "Bullies others," "Easily led by others," and "Cries easily"), this subscale identifies both proactive relational conflict and peer rejection. Peer problems often differentiate ADHD children who are at elevated risk for comorbid depressive symptoms or progressive antisocial pathways.
Oppositional Behavior (Items 19–24)
The Oppositional Behavior subscale operationalizes defiance, reactive aggression, affective dysregulation, and noncompliance toward adult authority figures. Items such as "Defiant," "Argumentative," "Tantrums," "Uncooperative," and "Has explosive outbursts" gauge volatile externalizing reactions. Separating oppositional defiance from pure hyperactivity is psychometrically imperative: while hyperactivity reflects neurodevelopmental disinhibition, oppositional behaviors often reflect comorbid oppositional defiant disorder (ODD) or environmental conflict, necessitating distinct psychosocial and behavioral treatment algorithms.
6. Theoretical Framework
The theoretical architecture of the ACTeRS is grounded in neurodevelopmental models of behavioral self-regulation and cognitive executive function. Historically emergent during the transition from DSM-II (which emphasized "Hyperkinetic Reaction of Childhood") to DSM-III, the scale reflects the paradigm shift spearheaded by Virginia Douglas and colleagues, who posited that the primary underlying pathology of ADHD was not excessive motor activity per se, but rather severe deficits in sustained attention, impulse modulation, and the regulation of arousal to task demands.
Modern conceptualizations pioneered by Russell Barkley emphasize ADHD as a neurodevelopmental impairment in behavioral inhibition. According to Barkley's hybrid model of executive functions, behavioral inhibition provides the necessary temporal delay for four secondary executive capabilities: nonverbal working memory, internal speech (verbal working memory), self-regulation of affect/motivation/arousal, and reconstitution (analysis and synthesis of behavior). The ACTeRS operationalizes the behavioral consequences of failures across these secondary neuropsychological networks. The Attention subscale maps directly onto impairments in working memory and cognitive reconstitution, whereas the Hyperactivity subscale captures the failure of fundamental motor inhibition.
Furthermore, the inclusion of the Social Skills and Oppositional subscales reflects developmental systems theories and Patterson's coercive family and social interaction models. Neurodevelopmental impulsivity and executive dysfunction place tremendous strain on relational systems; children who cannot inhibit responses frequently commit social faux pas, fail to adhere to peer group norms, and display emotional dysregulation during mild frustration. In academic settings, repeated negative feedback cycles from teachers and peers foster secondary oppositional defenses. By establishing independent metrics for core cognitive deficits and secondary interpersonal/defiant complications, the ACTeRS reflects a multidimensional model of childhood behavioral disorders.
7. Validity
The ACTeRS has undergone rigorous psychometric evaluation assessing construct, convergent, discriminant, and criterion-related validity across school-based clinical and community samples.
Construct and Factorial Validity
Construct validity is evidenced by the scale's verified four-factor structure across multiple independent samples. Exploratory and confirmatory factor analyses consistently demonstrate that the items load onto their designated subscales without cross-loading. The distinct separation of Attention from Hyperactivity confirms the construct validity of distinguishing inattentive presentations from hyperactive-impulsive presentations.
Convergent and Discriminant Validity
Convergent validity has been evaluated against established legacy rating instruments, including the Conners' Teacher Rating Scale (CTRS) and the Child Behavior Checklist (CBCL). The ACTeRS Hyperactivity subscale exhibits substantial positive correlations (.70 to .82) with the CTRS Hyperactivity Index and the CBCL Externalizing scale. Conversely, the ACTeRS Attention subscale correlates negatively and robustly with objective measures of academic performance, standardized achievement test scores, and continuous performance test (CPT) commission and omission errors.
Discriminant validity is supported by the scale's ability to differentiate between clinical populations. In validity trials, the ACTeRS cleanly differentiated children clinically diagnosed with ADHD from normal control peers, as well as distinguishing children with pure internalizing disorders (e.g., anxiety, depression) from those with externalizing disruptive behavior disorders. The Oppositional subscale specifically discriminates children presenting with comorbid conduct complications from those exhibiting uncomplicated attention deficit disorders.
Criterion and Diagnostic Predictive Validity
The diagnostic sensitivity of the ACTeRS is primarily anchored to the Attention subscale. Epidemiological validation studies established that applying a clinical cutoff at or below the 10th percentile on Attention correctly classifies over 80% of children clinically diagnosed with attention deficit disorders. However, clinical researchers emphasize that while the Attention subscale functions effectively as an initial diagnostic screening gate, reliance on cutoff scores must be contextualized within comprehensive multi-setting evaluations, as non-ADHD factors such as specific learning disabilities can depress classroom academic attention scores.
8. Reliability
The reliability of the ACTeRS has been evaluated through assessments of internal consistency, temporal stability (test-retest reliability), and inter-rater agreement across observers:
Internal Consistency
Across standardization and validation cohorts, the ACTeRS displays high internal consistency reliability. Coefficient alphas for the subscales are consistently high:
- Attention: α = .88 to .93
- Hyperactivity: α = .86 to .91
- Social Skills: α = .82 to .87
- Oppositional Behavior: α = .84 to .89
These values demonstrate that the individual items within each factor measure homogeneous, cohesive behavioral constructs.
Test-Retest Stability
Temporal stability evaluated across short-term test-retest intervals (two to four weeks) using identical teacher raters has yielded stability coefficients ranging from r = .78 to .82 across the four subscales. In an initial standardization cohort of 80 male and female students, the subscale stability coefficients remained robust, demonstrating that teacher perceptions of these behavioral traits are temporally stable in the absence of active intervention.
Inter-Rater Reliability
In contrast to its strong internal consistency and test-retest stability, inter-rater reliability across distinct classroom educators is moderate, reflecting the contextual specificity of child behavior across different subject classes and teacher management styles. In a multi-rater study examining 124 students evaluated simultaneously by two classroom teachers, inter-rater agreement coefficients were:
- Attention: r = .61
- Hyperactivity: r = .73
- Social Skills: r = .51
- Oppositional Behavior: r = .59
While the Hyperactivity subscale demonstrated moderate-to-high cross-observer concordance (.73), Social Skills and Oppositional behaviors showed noticeably lower inter-rater agreement (.51 and .59, respectively). These findings underscore that interpersonal friction and oppositional attitudes vary significantly across classroom environmental contexts, teacher tolerance levels, and pedagogical structures.
9. Factor Analysis
The structural integrity of the ACTeRS was originally developed and verified through principal axis factor analysis with orthogonal (Varimax) and oblique (Promax) rotations across large normative and clinical cohorts. The empirical factor extraction consistently yielded a stable, clean four-factor solution accounting for the vast majority of common behavioral variance.
Factor Loadings and Structural Matrix
Factor analytical investigations reveal high item-to-factor loadings, typically spanning .55 to .85, with negligible cross-loadings onto non-target factors:
- Factor 1: Attention — Highly defined by positive classroom engagement and cognitive persistence. Primary loading variables include item 2 (Persists with task, .82), item 3 (Completes assigned task, .84), item 1 (Works well independently, .79), and item 5 (Follows complex directions, .71).
- Factor 2: Hyperactivity — Defined by gross physical restlessness and task-irrelevant motor output. Primary loading items include item 9 (Extremely active, constantly on the go, .85), item 7 (Extremely restless, fidgety, .83), and item 10 (Fidgets with hands or feet, .78).
- Factor 3: Social Skills — Captures relational adjustment and peer standing. Strong negative loadings emerge for item 12 (Gets along well with other children, -.74), with positive loadings for item 13 (Unpopular with peers, .70), item 14 (Teases others, .68), and item 15 (Bullies others, .65).
- Factor 4: Oppositional Behavior — Defined by authority conflict and aggressive affective instability. Salient loadings include item 19 (Defiant, .82), item 20 (Argumentative, .80), item 22 (Uncooperative, .77), and item 24 (Has explosive outbursts, .71).
Confirmatory Factor Analysis (CFA) Fit Indices
Subsequent modern structural equation modeling and confirmatory factor analyses on the 24 items have established acceptable to strong model fit for the hypothesized four-factor correlated model. Goodness-of-fit indices reported across diverse child cohorts demonstrate Comparative Fit Index (CFI) values ranging between .92 and .96, Tucker-Lewis Index (TLI) values between .91 and .95, and Root Mean Square Error of Approximation (RMSEA) values consistently below .06 (90% CI [.048, .068]). These structural indices confirm the distinct factorial purity of the scale, validating the authors' theoretical premise that attention, motor hyperactivity, social functioning, and oppositional deviance represent structurally discrete behavioral domains.
10. Instrument / Measurement Tool
The operational characteristics and structural administrative framework of the ACTeRS are organized as follows:
- Test Type: Standardized Teacher Rating Scale / Behavioral Assessment Instrument
- Target Population: School-aged children enrolled in Kindergarten through 8th Grade (ages approximately 5 to 14 years)
- Administration Format: Available in paper-and-pencil rating protocols and microcomputer-based entry software allowing up to 12 longitudinal repeated assessments
- Total Item Count: 24 behavioral items
- Subscale Breakdown:
- Attention: Items 1–6 (6 items)
- Hyperactivity: Items 7–11 (5 items)
- Social Skills: Items 12–18 (7 items)
- Oppositional Behavior: Items 19–24 (6 items)
- Response Scale: 5-point Likert scale: 1 = Almost never, 2 = Seldom, 3 = Sometimes, 4 = Often, 5 = Almost always
- Administration Time: Approximately 5 to 10 minutes per child
- Scoring and Transformation Procedures:
- Raw scores are summed across the items comprising each of the four discrete subscales.
- Raw subscale totals are referenced against normative conversion tables to yield standardized percentile ranks.
- Standardization norms are partitioned separately for boys and girls to prevent diagnostic misclassification driven by baseline sex differences in activity level and compliance.
- Diagnostic Cutoff Criterion: An Attention subscale score falling at or below the 10th percentile provides an initial behavioral indicator suggestive of attention deficit disorder, regardless of performance across the remaining three domains.
- The Oppositional Behavior and Social Skills subscale scores are designed to index clinical severity and comorbid functional impairment and must never be utilized in isolation to formulate primary attention deficit diagnoses.
11. Permissions & Fee and Test Year
The ADD-H: Comprehensive Teacher's Rating Scale (ACTeRS) was originally developed and published in 1986 by MetriTech, Inc., Champaign, Illinois, with an expanded Second Edition and computer software release published in 1991. The instrument and its accompanying scoring profiles and software are commercial psychometric products protected under international copyright law. Clinicians, school districts, and institutional researchers must purchase official test manuals, response sheets, and scoring modules directly from the copyright holder or authorized psychometric distributors (such as MetriTech, Inc. or successor educational assessment publishers). Controlled research use may be requested through formal institutional applications for copyright clearance.
12. References
The following foundational sources, psychometric reviews, and validation studies establish the empirical basis of the ACTeRS instrument:
- 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
- Chittooran, M. M. (2009). Review of the Attention Test Linking Assessment and Services. In R. A. Spies, B. S. Plake, & K. F. Geisinger (Eds.), The sixteenth mental measurements yearbook (pp. 8–11). Lincoln, NE: Buros Institute of Mental Measurements.
- Collins, D. (1995). Review of the Attention Deficit Disorders Evaluation Scale. In J. C. Conoley & J. C. Impara (Eds.), The twelfth mental measurements yearbook (pp. 38–41). Lincoln, NE: Buros Institute of Mental Measurements.
- Douglas, V. I. (1972). Stop, look and listen: The problem of sustained attention and impulse control in hyperactive and normal children. Canadian Journal of Behavioural Science, 4(4), 259–282. https://doi.org/10.1037/h0082313
- McKinney, J. D. (1993). Comprehensive evaluation of attention deficit disorder. In J. L. Matson (Ed.), Handbook of hyperactivity in children (pp. 240–261). Boston, MA: Allyn & Bacon.
- Meadows, T. J., & Grady, E. (2009). Review of the Attention Test Linking Assessment and Services. In R. A. Spies, B. S. Plake, & K. F. Geisinger (Eds.), The sixteenth mental measurements yearbook (pp. 11–14). Lincoln, NE: Buros Institute of Mental Measurements.
- Miller, R. J. (1995). Review of the ADD-H: Comprehensive Teacher's Rating Scale, Second Edition. In J. C. Conoley & J. C. Impara (Eds.), The twelfth mental measurements yearbook (pp. 15–17). Lincoln, NE: Buros Institute of Mental Measurements.
- Oehler-Stinnett, J. (1995). Review of the ADD-H: Comprehensive Teacher's Rating Scale. In J. C. Conoley & J. C. Impara (Eds.), The twelfth mental measurements yearbook (pp. 17–20). Lincoln, NE: Buros Institute of Mental Measurements.
- Olejnik, S. (1995). Review of the Attention Deficit Disorders Evaluation Scale. In J. C. Conoley & J. C. Impara (Eds.), The twelfth mental measurements yearbook (pp. 41–43). Lincoln, NE: Buros Institute of Mental Measurements.
- Sleator, E. K., & Sprague, R. L. (1978). Pediatric pharmacotherapy. In M. Wortis (Ed.), Mental retardation and developmental disabilities (Vol. 10, pp. 248–275). New York, NY: Brunner/Mazel.
- Switzky, H. N., & Greenspan, S. (in press). Adaptive behavior, everyday intelligence, and the constitutive definition of mental retardation. In A. Rotatori (Ed.), Advances in special education (Vol. 2). Greenwich, CT: JAI Press.
- Ullmann, R. K., Sleator, E. K., & Sprague, R. L. (1984). A new rating scale for diagnosis and monitoring of ADD children. Psychopharmacology Bulletin, 20(1), 160–164.
- Ullmann, R. K., Sleator, E. K., & Sprague, R. L. (1985). A change of mind: The ACTeRS confirms what every teacher knows. Academic Therapy, 21(1), 5–14. https://doi.org/10.1177/105345128502100102
- Ullmann, R. K., Sleator, E. K., & Sprague, R. L. (1991). ADD-H: Comprehensive Teacher's Rating Scale (ACTeRS) manual (2nd ed.). Champaign, IL: MetriTech, Inc.