Table 4. The paired t-test for Q14–Q18 (N=34)

	Q14	Q15	Q16	Q17	Q18
t-value	18.85	15.40	14.82	16.81	18.25
p-value	0.000	0.000	0.000	0.000	0.000
Q14	Do you think that noise could make you experience loss of concentration?
Q15	Do you think noise could make you experience the decrease of sharpness of perception?
Q16	Do you think that noise could make you experience deteriorated judgment and poor decision making?
Q17	Do you think noise could prolong reaction?
Q18	Do you think noise could cause memory shortage?