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Children's Aggression Scale

Jeffrey M. Halperin, PhD, and Kathleen E. McKay, PhD

Evaluates frequency and severity of child and adolescent aggression
Paper and pencil, E-Manual
Age range:
5 years to 18 years
10–15 minutes
Qualification level:
A degree, certificate, or license to practice in a health care profession or occupation, including (but not limited to) the following: medicine, neurology, nursing, occupational therapy and other allied health care professions, physician's assistants, psychiatry, social work; plus appropriate training and experience in the ethical administration, scoring, and interpretation of clinical behavioral assessment instruments. Certain health care providers may be eligible to purchase selected "B" and "C" level instruments within their area of expertise. Specifically, relevant supervised clinical experience using tests (i.e., internship, residency, etc.) in combination with formal coursework ( i.e., Tests and Measurement, Individual Assessment, or equivalent) qualifies a health care provider to purchase certain restricted products. Any PAR Customer already qualified to purchase a "B" or "C" level product, is also qualified to purchase an "S" level product. If you are not already qualified to purchase a "B"or "C" level product from PAR, please download and complete the special Qualification Form for Medical and Allied Health Professionals. (You will need Adobe Acrobat to view.) Close

Results Facilitate Treatment Planning and Monitoring in Response to Acts of Aggression


The CAS is a multi-informant rating scale that evaluates the setting-specific frequency and severity of aggressive acts in children through parent and teacher rating forms.

Features and benefits

  • The parent and the teacher versions of the Children’s Aggression Scale were developed to help evaluate the nature, severity, and frequency of aggressive behaviors in children, distinct from those behaviors better characterized as oppositional/defiant or hostile.
  • Provides the comprehensive information that is necessary to develop an empirically based behavioral treatment plan for aggression as a symptom.
  • Well suited for use in clinical, educational, forensic/criminal justice, and research settings.
  • Items describe aggressive acts and are weighted differentially depending on the severity of the act.
  • Standardized on a community sample of 438 parents and 516 teachers of children ages 5-18 years. Data were also collected on a clinical sample of 247 parents and 252 teachers of children who had been diagnosed with one or more of the following: ADHD, oppositional defiant disorder, conduct disorder, and social maladjustment.
  • Validity was examined in terms of intercorrelations among the scales and clusters, convergent validity with existing behavioral measures (i.e., BASC-2, CBCL) and domain-specific assessments (i.e., OAS, CDS, IOWA Conners), and clinical validity among the clinical samples.