Table 5.

Results of the Test–Retest Reliability Analysis of Ocular Counter-Roll Degrees in the Control Group

	Recording Time (seconds)	Recording Eyes	Test	Retest	Correlation Matrix	Intraclass Correlation Coefficient (Cronbach’s alpha)
15° Head tilt toward right side	20	Left	2.53 ± 1.35	2.4 ± 1.22	0.533	0.693
		Right	2.96 ± 1.44	2.83 ± 1.39	0.698	0.822
	30	Left	2.5 ± 1.38	2.33 ± 1.12	0.554	0.703
		Right	2.9 ± 1.21	2.76 ± 1.43	0.642	0.775
	40	Left	2.46 ± 1.35	2.36 ± 1.27	0.436	0.607
		Right	3.03 ± 1.4	2.9 ± 1.34	0.604	0.753
	60	Left	2.3 ± 1.29	2.23 ± 1.41	0.155	0.268
		Right	3 ± 1.36	2.83 ± 1.44	0.649	0.787
30° Head tilt toward right side	20	Left	4.63 ± 2.12	4.53 ± 1.99	0.812	0.895
		Right	5 ± 2	5.36 ± 1.86	0.841	0.912
	30	Left	4.8 ± 2.24	4.63 ± 1.9	0.836	0.904
		Right	5.23 ± 2.23	5.43 ± 1.95	0.77	0.866
	40	Left	4.5 ± 2.21	4.7 ± 1.95	0.796	0.883
		Right	5.13 ± 2.23	5.23 ± 1.94	0.833	0.904
	60	Left	4.6 ± 2.06	4.63 ± 1.97	0.793	0.884
		Right	5.3 ± 2.11	5.16 ± 1.87	0.81	0.892
40° Head tilt toward right side	20	Left	5.63 ± 2.14	5.8 ± 2.36	0.848	0.915
		Right	6.23 ± 2.12	6.46 ± 2.44	0.707	0.824
	30	Left	5.86 ± 2.17	5.9 ± 2.26	0.704	0.826
		Right	6.5 ± 2.34	6.56 ± 2.32	0.773	0.872
	40	Left	5.8 ± 2.18	6 ± 2.31	0.789	0.881
		Right	6.36 ± 2.48	6.63 ± 2.12	0.745	0.848
	60	Left	5.7 ± 2.13	6.06 ± 2.5	0.774	0.864
		Right	6.36 ± 2.48	6.56 ± 2.28	0.825	0.902