Table 6.

Fixed effects of the optimal (cubic) model for the combined model (reanalyzed dataset)

Term	Estimate (β)	SE	df	t statistic	p value
Intercept	− 0.045	0.052	165.0	− 0.857	0.393
Linear	0.022	0.015	6890.0	1.436	0.151
Quadratic	− 0.044	0.015	6890.0	− 2.924	0.003a
Cubic	0.060	0.015	6890.0	4.001	<0.001a
SI	0.121	0.083	165.0	1.467	0.144
TU	0.010	0.067	165.0	0.151	0.880
SI × Linear	− 0.023	0.021	6890.0	− 1.070	0.285
TU × Linear	0.034	0.021	6890.0	1.601	0.109
SI × Quadratic	− 0.055	0.021	6890.0	− 2.609	0.009a
TU × Quadratic	0.070	0.021	6890.0	3.292	0.001a
SI × Cubic	− 0.036	0.021	6890.0	− 0.907	0.364
TU × Cubic	− 0.148	0.021	6890.0	− 1.693	0.091

β standardized regression coefficient, TU task-unrelatedness, SI stimulus-independence

^aSignificant at α = 0.05