Table 2.

Interaction between vowel effect (high∕low, front∕back, and round∕unround) and time trends (linear and quadratic). Linear and quadratic coefficients are shown for significant effects (p < 0.01). Second feature of each pair is reference case.

	H∕L		F∕B		R∕U
	L	Q	L	Q	L	Q
JWy	0.725	0.578	—	—	0.621	0.489
JWx	—	—	—	—	—	—
T1y	−0.283	—	—	—	−0.328	—
T1x	—	—	—	0.502	—	—
CL	—	0.423	—	−0.347	—	0.462
CD	−0.447	−0.309	−0.336	—	—	—
T2y	1.211	0.840	0.810	0.468	0.742	0.564
T3y	1.717	0.750	1.130	0.666	1.212	—
T4y	0.919	—	—	0.474	0.775	—
T2x	0.572	—	0.365	0.590	—	—
T3x	0.473	—	0.529	0.482	—	—
T4x	0.405	—	0.626	0.476	—	—
LY	−0.641	—	—	—	—	—
LX	—	—	—	—	—	—
M1	−302	−260	—	—	−203	−244