Universiti Sains Malaysia (USM) Attitudes toward Statistics (USM-AS) is a newly developed, selfadministered inventory for measuring attitudes toward statistics among postgraduate students. The
USM-AS consists of three factors (affect, cognition, and behavior) and 58 items. This study was
aimed to validate the USM-AS and provide evidence of its construct validity by investigating its
internal structure. This study consists of four validation studies, which were conducted consecutively
among postgraduate students (master’s degree and PhD students) in the medical and health sciences.
The revised USM-AS, consisting of three factors and 12 items, was found to have good construct
validity, which was demonstrated by good model fit, high factor loadings (0.62 to 0.92), high
construct reliability (0.84 to 0.89), good discrimination between factors and good test-retest reliability
(intraclass correlation coefficients = 0.63 to 0.82). However, validity was limited to postgraduate
students in the medical and health sciences in Malaysia. Further validation studies among
postgraduate students in other scientific fields are recommended to provide additional construct
validity evidence of the USM-AS.