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Children’s GlobalChildren’s Global
Assessment Scale CGASAssessment Scale CGAS
Strengths & WeaknessesStrengths & Weaknesses
Ellen, Amber, Katerina & MaryEllen, Amber, Katerina & Mary
Chapman UniversityChapman University
CSP 517CSP 517
April 23, 2013April 23, 2013
CGAS:CGAS:
• Assesses global level of functioning &
severity of mental illness
• Target: children / adolescents 4-16
• Scales assess psychological, social &
occupational functioning
• Scores based upon parent, educator &
child interviews, as well as observation
AdministrationAdministration
• Administered by clinicians
• Scores 1-100 (lower scores = more
impairments / need of supervision)
Example
– Major depressive disorder: score = 40
– After treatment: score = 75
(indicates slight functional impairment)
StrengthsStrengths
• Public domain – free, universally available
• Simple, no administration time
– based on prior clinical assessment
• Assimilates / synthesizes social &
psychiatric functioning data into single
index
• English, Spanish, Swedish
• Comprehensive: Measures level of
functioning at home, at school, with peers
• Tests child’s temporary state of being
(1mo)
• Anchor points make scoring easy
StrengthsStrengths
StrengthsStrengths
• Training quick & cost-efficient (CD/seminar)
• Several longitudinal & epidemiological
studies
• CGAS ratings correlate well with a child’s
intellectual functioning, school
competence & social skills
• Strong test-retest reliability
StrengthsStrengths
• Reliability & validity well established in
research settings
• Inter-rater reliability high in research
based setting
• Sensitive to change over time
• Discriminant validity established
– distinguishes between distinct groups of
children
WeaknessesWeaknesses
• More moderate inter-rater reliability in
clinical setting
• Raters must be clinicians familiar with:
behavioral rating scales / administration /
interpretation of psychological measures
• Training information incomplete in
literature
WeaknessesWeaknesses
• Significant difference between experts &
untrained raters
• Ambiguous language may lead to
clinicians using different strategies for
ratings
• Subjectivity of parents, clinicians
• Concurrent validity difficult to establish
Questions?Questions?
Children’s GlobalChildren’s Global
Assessment Scale CGASAssessment Scale CGAS
Strengths & WeaknessesStrengths & Weaknesses
Ellen, Amber, Katerina & MaryEllen, Amber, Katerina & Mary
Chapman UniversityChapman University
April 23, 2013April 23, 2013

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Cga srev4222013a

  • 1. Children’s GlobalChildren’s Global Assessment Scale CGASAssessment Scale CGAS Strengths & WeaknessesStrengths & Weaknesses Ellen, Amber, Katerina & MaryEllen, Amber, Katerina & Mary Chapman UniversityChapman University CSP 517CSP 517 April 23, 2013April 23, 2013
  • 2. CGAS:CGAS: • Assesses global level of functioning & severity of mental illness • Target: children / adolescents 4-16 • Scales assess psychological, social & occupational functioning • Scores based upon parent, educator & child interviews, as well as observation
  • 3. AdministrationAdministration • Administered by clinicians • Scores 1-100 (lower scores = more impairments / need of supervision) Example – Major depressive disorder: score = 40 – After treatment: score = 75 (indicates slight functional impairment)
  • 4. StrengthsStrengths • Public domain – free, universally available • Simple, no administration time – based on prior clinical assessment • Assimilates / synthesizes social & psychiatric functioning data into single index
  • 5. • English, Spanish, Swedish • Comprehensive: Measures level of functioning at home, at school, with peers • Tests child’s temporary state of being (1mo) • Anchor points make scoring easy StrengthsStrengths
  • 6. StrengthsStrengths • Training quick & cost-efficient (CD/seminar) • Several longitudinal & epidemiological studies • CGAS ratings correlate well with a child’s intellectual functioning, school competence & social skills • Strong test-retest reliability
  • 7. StrengthsStrengths • Reliability & validity well established in research settings • Inter-rater reliability high in research based setting • Sensitive to change over time • Discriminant validity established – distinguishes between distinct groups of children
  • 8. WeaknessesWeaknesses • More moderate inter-rater reliability in clinical setting • Raters must be clinicians familiar with: behavioral rating scales / administration / interpretation of psychological measures • Training information incomplete in literature
  • 9. WeaknessesWeaknesses • Significant difference between experts & untrained raters • Ambiguous language may lead to clinicians using different strategies for ratings • Subjectivity of parents, clinicians • Concurrent validity difficult to establish
  • 11. Children’s GlobalChildren’s Global Assessment Scale CGASAssessment Scale CGAS Strengths & WeaknessesStrengths & Weaknesses Ellen, Amber, Katerina & MaryEllen, Amber, Katerina & Mary Chapman UniversityChapman University April 23, 2013April 23, 2013