Psychometric properties of the Bender Gestalt Test using Lacks' version of the Hutt-Briskin scoring system.
Criterion-referenced (Livingston r) and norm-referenced (Gilmer-Feldt r and Coefficient Alpha) techniques were used to calculate the internal consistency reliability of the Bender-Gestalt Test (BGT) Total Score using the 12-item Lacks system of scoring. Livingston's r was found to be .825 for the Lacks BGT cutoff score of 5. The Gilmer-Feldt and alpha coefficients for the Lacks Total Score was found to be .644 and .626, respectively. An item analysis showed that most of the BGT items (9 out of 12) were within established criteria for item difficulty, however, 7 items were found to be poor discriminators. The interscorer reliabilities based on three scorers, two scorers, and a single scorer was found to be .895, .852, and .740, respectively. Due to the low reliabilities and several inherent flaws that were identified with the Lacks scoring system, the authors recommend that users of the BGT consider alternative objective scoring systems.
Lopez
Michael N
MN
Department of Veterans Affairs Healthcare System, Long Beach, California, USA. michael.lopez@va.gov
Perez
Jose J
JJ
Smith
Whitney E
WE
Castillo
Wendy
W
D000328:Adult; D001538:Bender-Gestalt Test / Q000706:statistics & numerical data*; D003072:Cognition Disorders / Q000175:diagnosis* / Q000523:psychology; D016001:Confidence Intervals; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011594:Psychometrics; D015203:Reproducibility of Results