Table 4.

Multiple regressions demonstrating the relation between language laterality and the planum temporale asymmetry measures (PTA and PTPPA, respectively) after controlling for handedness, brain volume, age, and image section thickness

	Standardized β	t	Sig.
Level 1 (r = .01, F = 0.13, ns)
PTA	.04	.36	ns
Level 2 (r = .44, F = 3.66, p < .01)
PTA	.03	.33	ns
Handedness	.39	3.84	***
Brain volume	−.32	−2.41	*
Age	−.09	−.98	ns
Sex	−.15	−1.17	ns
Section thickness	−.02	−.17	ns
Level 1(r = .05, F = 0.20, ns)
PTPPA	−.05	−.45	ns
Level 2 (r = .44, F = 3.73, p < .01)
PTPPA	−.06	−.66	ns
Handedness	.40	3.88	***
Brain volume	−.31	−2.35	*
Age	−.11	−1.14	ns
Sex	−.15	−1.16	ns
Section thickness	−.02	−.23	ns

ns, non-significant.

^*p < .05.

^***p < .001.