Table 3.

Familiality estimates for forward and backward span scores with and without covarying BACS composite scores.

	Schizophrenia Pedigrees		Bipolar Pedigrees
	Forward spam	Backward span	Forward span	Backward span
BACS excluded from model	0.35§	0.36§	0.50§	0.51§
h2 (SD)	(.10)	(.11)	(.12)	(.12)
BACS included as covariate	0.24†	0.29†	0.39§	0.43§
h2 (SD)	(.11)	(.11)	(.13)	(.12)

^†p ≤ .01

^§p ≤ .001