Table 1.

Binocular rivalry summary statistics and correlations

Variable	Test		Retest		Reliability		Twin correlations
	Mean (SD)	Range	Mean (SD)	Range	Within-test r (95% CI)	Between-test r (95% CI)	MZ r (95% CI)	DZ r (95% CI)
Binocular rivalry rate, Hz	0.54 (0.15)	0.08–1.32	0.53 (0.16)	0.21–1.04	0.93 (0.92–0.94)	0.70 (0.58–0.78)	0.51 (0.37–0.62)	0.19 (0.07–0.31)
log predominance	0.17 (0.09)	−0.44–0.48	0.14 (0.08)	−0.24–0.22	0.71 (0.67–0.75)	0.43 (0.23–0.59)	0.08 (−0.10–0.25)	0.07 (−0.06–0.19)
Mixed hits	18.4 (25.4)	0–156	12.5 (18.0)	0–83	0.94 (0.92–0.95)	0.30 (0.03–0.53)	−0.10 (−0.32–0.13)	−0.11 (−0.27–0.05)
Mixed time, seconds	33.9 (50.2)	0–372.1	25.3 (42.8)	0–243.0	0.91 (0.89–0.93)	0.39 (0.13–0.60)	−0.14 (−0.34–0.08)	−0.12 (−0.28–0.04)

All mean, SD, and range values are before winsorization. Data were winsorized to ± 3.3 SD before (i) reliability and twin maximum likelihood correlation analyses, (ii) preliminary analyses for genetic modeling, and (iii) genetic modeling. Mixed hits and mixed time were categorized for correlation analyses because of non-normal distribution (thresholds were set that divided each variable into three categories of approximately equal size based on scores from the first test occasion). Exclusive binocular rivalry was achieved successfully, indicated by comparison of mixed hits/time with the hits/time associated with vertical (V) and horizontal (H) grating percepts, for which the Test group means, SD, and ranges are, respectively: V hits, 189.0, 64.3, 18–516; V time, 353.0, 61.8, 84.1–547.1; H hits, 188.9, 64.3, 19–514; H time, 339.1, 61.8, 109.3–549.8.