The results of “the number of total questions answered(TOTAL),” “the number of incorrect answers (ERROR),”“the number of correct answers (SCORE),” and “the ratioof ERROR to TOTAL (Error Rate)” associated with thethree CCT conditions are summarized in Table I. It isfound that CCT has significant effect on TOTAL andSCORE. The pairwise comparisons of the three CCT conditionsare reported in Table II. The TOTAL and SCOREin the 4300 K group are significantly higher than those of6500 K. This implies that the subjects demonstrate betterfocused and sustained attention when CCT is 4300 K(Fig. 3).