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document
Developmental disabilities modification of the Children 's Global Assessment Scale . BACKGROUND Interventions for pervasive developmental disorders ( PDD ) aim to alleviate symptoms and improve functioning . To measure global functioning in treatment studies , the Children 's Global Assessment Scale was modified and psychometric properties of the revised version ( DD-CGAS ) were assessed in children with PDD . METHODS Developmental disabilities-relevant descriptors were developed for the DD-CGAS , and administration procedures were established to enhance rater consistency . Ratings of clinical case vignettes were used to assess inter-rater reliability and temporal stability . Validity was assessed by correlating the DD-CGAS with measures of functioning and symptoms in 83 youngsters with PDD . Sensitivity to change was assessed by comparing change from baseline to post-treatment with change on the Aberrant Behavior Checklist-Irritability and Clinical Global Impressions-Improvement subscale scores in a subset of 14 children . RESULTS Inter-rater reliability ( intraclass correlation coefficient [ ICC ] = .79 ) and temporal stability ( average ICC = .86 ) were excellent . The DD-CGAS scores correlated with measures of functioning and symptoms with moderate to large effect sizes . Changes on the DD-CGAS correlated with changes on the Aberrant Behavior Checklist-I ( r = -.71 ) and Global Impressions Scale-I ( r = -.52 ) . The pre-post DD-CGAS change had an effect size of .72 . CONCLUSIONS The DD-CGAS is a reliable instrument with apparent convergent validity for measuring global functioning of children with PDD in treatment studies .
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Intervention_Educational
Interventions
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Intervention_Educational
psychometric properties of the revised version ( DD-CGAS )
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Outcome_Other
Inter-rater reliability ( intraclass correlation coefficient [ ICC ]
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Outcome_Other
temporal stability ( average ICC
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Outcome_Mental
DD-CGAS scores
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Outcome_Other
functioning
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Outcome_Other
symptoms
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Outcome_Mental
DD-CGAS
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Outcome_Mental
Aberrant Behavior Checklist-I
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Outcome_Mental
Global Impressions Scale-I
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Outcome_Mental
pre-post DD-CGAS change