Table 6.

Parameter Estimates for the Best-Fit Model for Animal Fears^a

	λ Path		Residual		Genetic Factors					Shared Environmental Factors					Unique Environmental Factor
Factor (Age, y)	P	S	P	S	Total a2, %	1	2	3	4	Total c2, %	1	2	3	4	Total e2, %	1	2	3	4
1 (8–9)	0.90	NA	0	NA	34	0.58	…	…	…	62	0.79	…	…	…	4	0.21	…	…	…
2 (13–14)	0.92	0.55	0.27	0.54	44	0.28	0.60	…	…	42	0.37	0.53	…	…	15	0.32	0.22	…	…
3 (16–17)	0.84	0.51	0.26	0.54	45	0.14	0.64	0.15	…	38	0.47	0.27	0.30	…	17	0.35	−0.13	0.16	…
4 (19–20)	NA	0.61	NA	0.54	56	0.01	0.53	0.45	0.27	19	0.40	0.16	0	0	25	0.40	−0.08	−0.23	0.18

Abbreviations: See Table 5.

^aResults for the “upper part” of the model only (Figure 1), which includes fear symptoms shared by parent and self-reporters. Parameter estimates constrained to equality across the sexes and the value of r_g set to 0.34. Parameter estimates for the lower part of the model are available in eTable 2 (http://www.archgenpsychiatry.com). The λ path, depicted in Figure 1, connects the latent liability to fears to the report level of fears from parent report (P) and self-report (S).