Data Analyses
Different methods were used to generate evidence on the validity of the 20 test items under EOmciSS subscales. At the test level, the structure of the 20 item factors (13 Acc + 6 RT + 1 order) was explored by confirmatory factor analysis. At item and subtest levels, “item difficulty,” “discriminative index,” and “internal consistency” were the indices. “Item difficulty” refers to the proportion of correct answers per item [As suggested by Boateng et al [