Haidarali homan; kamran ganji; roya farajollahi
Volume 2, Issue 6 , January 2012, , Pages 1-29
Abstract
Background: The clock drawing test (CDT) is a neuropsychological test that has been used as a part of evaluation & screening of adults with cognitive impairments.
Objectives: The aim of this research was study of possibility, reliability, validity and norm finding of Clock Drawing Test (CDT) in ...
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Background: The clock drawing test (CDT) is a neuropsychological test that has been used as a part of evaluation & screening of adults with cognitive impairments.
Objectives: The aim of this research was study of possibility, reliability, validity and norm finding of Clock Drawing Test (CDT) in 392 elementary school children of Tehran city.
Methods: The samples were selected by random multi step cluster sampling method. Students with behavioral, emotional, mental and pervasive developmental disorders eliminated after performing teacher form of Children Symptom Inventory (CSI-4, Gadow and Sprafkin, 1994) and Raven Progressive Matrices (Raven et al, 1983). Then, test copy of reproduction memoir figures (Caffarra et al, 2002) and CDT (Cohen et al, 2000) accomplished by 392 participants.
Results: Data analysis showed that the reliability coefficient Cronbach’s Alpha was 0/765. None of the 8 criterion for numbering of CDT was not omitted. Furthermore, inter-rater reliability and test-retest reliability were equal. /95 and. /90 respectively. The structure validity of CDT was study by main component analysis method. The amount of sampling sufficiency by KMO measure was. /716 and Bartlett’s Test of Sphericity was meaningful, then the condition were suitable for performing factor analysis. The results of factor analysis with Promax rotation extracting 2 parameters include: 1- Clock construction, 2- Time conception, that explained about 63% of total variance. Also, the concurrent validity of CDT and test copy of reproduction memoir figures was very suitable.
Conclusion: The clock drawing test has a good reliability and validity for cognitive evaluation of children.
