Table 4.

Subgroup Analysis for Task Complexity.

Comparison	Complexity	o	SMCR	SE	95% CI	p	∆SMCRsimple-complex	p (∆SMCRsimple-complex)	τ	∆τ2
1.2	simple	25	−0.108	0.044	[−0−199, 0.018]	0.021	0.159	0.001	0.224	0.117
	complex	103	−0.268	0.044	[−0.357, −0.179]	<0.001
1.3	simple	12	−0.130	0.070	[−0.272, 0.012]	0.071	0.295	0.004	0.386	0.063
	complex	46	−0.425	0.091	[−0.611, −0.239]	<0.001
2.3	simple		−0.022	0.047	[−0.117, 0.074]	0.645	0.135	0.029
	complex		−0.157	0.068	[−0.296, −0.018]	0.028
1.2 vs. 2.3	simple		−0.087	0.059	[−0.207, 0.034]	0.152	0.024	0.347
	complex		−0.157	0.068	[−0.296, −0.018]	0.122

Note. o = number of outcomes, SMCR = standardized mean change with raw score standardization, SE = standard error, CI = confidence interval, ∆SMCR_{simple-complex} = difference of RT reduction between complex and simple tasks, τ = estimated overall SD of the true effect from the model including the moderator, ∆_τ² = proportion of explained variance of the presented model (model 2) compared to the model without moderators (model 1), as $\frac{{\mathsf{\tau }}_{model1}^2-{\mathsf{\tau }}_{model2}^2}{{\mathsf{\tau }}_{model1}^2}$.