Research findings were as follows : (1) The developed a critical thinking test contained
48 items for assessment of six factors each of which required 8 items. The six factors under
assessment were interpretation, analysis, evaluation, inference, explanation, and self-regulation. (2)
Content validity of the test as shown by the IOC index ranged from 0.71 to 1.00. Its difficulty indices
were in the range of 0.37 to 0.75 and its discriminating indices were in the range of 0.23 to 0.78 Its
construct validity was at the good level as shown by all six factors being significant at the .05 level
with the chi-square goodness of fit test at 7.48; p = 0.35, df =7, GFI = 1.00, AGFI = 0.99 and CFI
= 1.00. Reliability indices of the test were as follow: .68 for interpretation, .70 for analysis, .70 for
evaluation, 0.74 for inference, 0.73 for explanation, 0.75 for self- regulation, and 0.94 for the whole
test. As for the test norm, the normalized T-scores were in the range of T12 to T74
Research findings were as follows : (1) The developed a critical thinking test contained48 items for assessment of six factors each of which required 8 items. The six factors underassessment were interpretation, analysis, evaluation, inference, explanation, and self-regulation. (2)Content validity of the test as shown by the IOC index ranged from 0.71 to 1.00. Its difficulty indiceswere in the range of 0.37 to 0.75 and its discriminating indices were in the range of 0.23 to 0.78 Itsconstruct validity was at the good level as shown by all six factors being significant at the .05 levelwith the chi-square goodness of fit test at 7.48; p = 0.35, df =7, GFI = 1.00, AGFI = 0.99 and CFI= 1.00. Reliability indices of the test were as follow: .68 for interpretation, .70 for analysis, .70 forevaluation, 0.74 for inference, 0.73 for explanation, 0.75 for self- regulation, and 0.94 for the wholetest. As for the test norm, the normalized T-scores were in the range of T12 to T74
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