Table 6.

Percentage of variance explained by AoA, subjective frequency (SUBJ), and imageability (IMA) in addition to the variance explained by word length and word frequency.

	LDT	Naming	PDM	LDTFLP
Nlett + FREQ	0.474	0.095	0.282	0.261
Nlett + FREQ + AoA	0.520**	0.106**	0.291**	0.298**
Nlett + FREQ + SUBJ	0.496**	0.102**	0.287**	0.277**
Nlett + FREQ + IMA	0.528**	0.096	0.296**	0.302**
Nlett + FREQ + AoA + SUBJ	0.531**	0.110*	0.294*	0.306**
Nlett + FREQ + AoA + IMA	0.536**	0.106	0.297**	0.309**
Nlett + FREQ + AoA + IMA + SUBJ	0.557**	0.110*	0.302**	0.323**

p < 0.05, **p < 0.01 (determined with an ANOVA between the two models) in which model1 is Nlett + FREQ for AoA and SUBJ, and model1 = Nlett + FREQ + AoA for AoA + SUBJ and AoA + IMA, and model1 = Nlett + FREQ + AoA + IMA for the full model in the last row). Nlett, number of letters; FREQ, frequency; AoA, age-of-acquisition; SUBJ, subjective frequency; IMA, imageability. Cubic splines used for Nlett and FREQ.