Table 3.

Phenotypic, genetic and non-shared environmental correlations. Note. rPh, overall phenotypic correlation between synaesthesia screening score and autistic traits (total and sub-domains) derived from the bivariate AE models. rA, additive genetic correlation; rE, non-shared environmental correlation; CI, confidence interval; RRBI-D, sub-domain of repetitive behaviours, restricted interests and attention to details; SIC, sub-domain of social interaction and communication difficulties.

	rPh (95% CI)	rA (95% CI)	rE (95% CI)
total autistic traits	0.17 (0.13–0.20)	0.26 (0.17–0.36)	0.09 (0.02–0.15)
RRBI-D	0.19 (0.17–0.22)	0.34 (0.23–0.45)	0.09 (0.02–0.16)
SIC	0.09 (0.06–0.13)	0.18 (0.08–0.28)	0.02 (−0.05–0.09)