Table 2.

Summary of the mixed effects logistic regression model predicting tip-of-the-tongue occurrence in the older adults.

	Coefficient	SE	Wald z	p value
Intercept	−3.17	0.26	−12.04	<0.001	***
No. phonemes of target word	0.32	0.09	3.68	<0.001	***
Vocabulary size	−0.06	0.01	−5.48	<0.001	***
Age	0.05	0.02	2.22	0.027	*
Aerobic fitness ($\dot{\mathrm{V}}$O2max score)	−0.28	0.12	−2.25	0.024	*

Note: N = 1680, AIC = 998.7, log-likelihood = −492.3, *** < 0.001 ** < 0.01 * < 0.025.

This model included a random intercept for items and participants. Multicollinearity was low (all VIF < 1.2).