Table 4.

Item Analysis of LED-GDI (N=144)

Questionnaire Items	Mean	SD	Skewness		Kurtosis		t	95% Confidence Interval		Correlation with Total Score
			Statistic	Std. Error	Statistic	Std. Error		Lower	Upper
Total score of Index	49.43	5.834
Q1	3.17	0.778	−0.855	0.202	0.643	0.401	−6.538***	−1.196	−0.639	0.550**
Q2	3.08	0.762	−0.623	0.202	0.258	0.401	−9.009***	−1.300	−0.830	0.606**
Q3	3.15	0.757	−0.741	0.202	0.510	0.401	−8.627***	−1.332	−0.833	0.622**
Q4	3.30	0.604	−0.243	0.202	−0.598	0.401	−8.664***	−1.057	−0.662	0.607**
Q5	3.35	0.629	−0.598	0.202	0.290	0.401	−12.019***	−1.145	−0.820	0.628**
Q6	3.45	0.624	−1.040	0.202	1.715	0.401	−9.677***	−1.085	−0.715	0.566**
Q7	3.35	0.607	−0.726	0.202	1.542	0.401	−6.955***	−0.907	−0.504	0.482**
Q8	3.54	0.527	−0.459	0.202	−1.161	0.401	−7.252***	−0.813	−0.464	0.488**
Q9	3.33	0.637	−0.915	0.202	1.990	0.401	−11.674***	−1.082	−0.768	0.584**
Q10	3.47	0.566	−0.709	0.202	0.885	0.401	−8.448***	−0.964	−0.597	0.616**
Q11	3.19	0.836	−0.949	0.202	0.495	0.401	−6.932***	−1.262	−0.700	0.530**
Q12	3.16	0.799	−0.713	0.202	0.042	0.401	−6.891***	−1.182	−0.653	0.518**
Q13	3.29	0.613	−0.265	0.202	−0.609	0.401	−10.384***	−1.136	−0.771	0.695**
Q14	3.33	0.669	−0.781	0.203	0.720	0.403	−12.323***	−1.237	−0.894	0.648**
Q15	3.28	0.694	−0.816	0.202	0.896	0.401	−8.814***	−1.183	−0.748	0.549**

Notes: *** At a significance level of 0.001 (two-tailed), the correlation was significant. **At a significance level of 0.01 (two-tailed), the correlation was significant.