Table 2. Assessing task effects on parameter age trajectories.

Model fits (AIC scores) of regression models predicting parameter age trajectories, comparing the added value of including (‘AIC with task’) versus excluding (‘AIC without task’) task as a predictor. Differences in AIC scores were tested statistically using F-tests. Better (smaller) model fits are highlighted in bold. The coefficients of the winning models (simpler model ‘without task’ unless adding task predictor leads to significantly better model fit) are shown in Table 3.

Parameter	AIC without task	AIC with task	F(df)	p	sig.
$\frac{1}{\beta }/ϵ$	2,044	2,054	NA	NA	–
${\alpha }_{+}$	2,044	2,042	$F(4,245)=2.34$	$p=0.056$	–
${\alpha }_{-}$	1,395	1,373	$F(2,245)=6.99$	$p=0.0011$	**
Forgetting	1,406	1,411	NA	NA	–