Confirmatory Factor Analysis of the Das-Naglieri: Cognitive Assessment System Egyptian Edition: Tests with three Age Groups

Authors: [1] Amal A. M. Sadek [2] Suzanne M. I. Arafa [3] Mohamed A. K. Abdel Ghafar

Pages: 78-83

Abstract:

This study aims to measure the psychometric properties of the Das-Naglieri Cognitive Assessment System (D-N CAS-E), and to determine the configural invariance of the four factor theoretical model for the PASS neurocognitive abilities across 3 agedifferentiated groups. Confirmatory Factor Analysis (CFA) was conducted to examine the construct validity of the Egyptian version of D-N CAS characteristics among a standardization sample (N=750), normally developed children and late adolescents, divided into 3 different age groups. The current Egyptian sample demonstrated a four factor solution for the PASS neurocognitive abilities among children and adolescents with normal development and different achievement levels. Several fit indices were used including x²= 34.59 P<.001, df=.88, RMSEA=.012. In addition, the values of AGFI, CFI, and GFI are above .90 and .80 respectively, are indicative for a good fit of the first order PASS model. All subtests of the battery demonstrated excellent psychometric properties, with acceptable reliability (r=.98, P<.001). Moreover, the results suggested that PASS model and the CAS measures the same constructs with a good fit among various models of different age groups. The findings confirmed, (Naglieri& Das, 1997) the results for which the latent factor of the D-N CAS-E provided the best conceptualization of the underlying interrelations among subtests similar to the original factor structure of the D-N CAS.