title: Reliability of the Koppitz scoring system for the Bender Gestalt Test.
abstract: This study investigated the test-retest reliability of the Koppitz scoring system with Bender Gestalt protocols of adult retardates. Results of a sample of 74 adult retardates yielded a correlation of .80 over an interval of 8 to 146 months. A directional measure of change between error scores on the first and second administrations was not significant, which suggests that the test-retest reliability coefficient is an accurate estimate of the Koppitz scoring system for adult retardates. Scorer reliability for three independent scorers ranged from .92 to .95, which suggests comparability to other investigations with different populations.
mesh_terms: D000328:Adult; D001538:Bender-Gestalt Test; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D008297:Male; D011594:Psychometrics; D013997:Time Factors