Table 2.

AIC comparisons to determine the optimal model predicting AG activity

Comparison	Model	ΔAIC	df
(A) Random effects	PSC ~ 1 + (1 | participant) + (1 | task/condition)	0	5*
	PSC ~ 1 + (1 | participant) + (1 | task)	5.5	4
	PSC ~ 1 + (1 | participant) + (1 | condition)	463.5	4
	PSC ~ 1 + (1 | participant)	1610	3
(B) zRT and zER	PSC ~ zRT + (1 | participant) + (1 | task/condition)	0	6*
	PSC ~ 1 + (1 | participant) + (1 | task/condition)	42.2	5
	PSC ~ zER + (1 | participant) + (1 | task/condition)	43.6	6
(C) Interactions	PSC ~ zRT + semantics + ROI + zRT:ROI + semantics:ROI + (1 | participant) + (1 | task/condition)	0	16*
	PSC ~ zRT + semantics + ROI + zRT:semantics + zRT:ROI + semantics:ROI + (1 | participant) + (1 | task/condition)	0.3	17
	PSC ~ zRT + semantics + ROI + zRT:semantics + zRT:ROI + semantics:ROI + zRT:semantics:ROI + (1 | participant) + (1 | task/condition)	5.4	20
	PSC ~ zRT + semantics + ROI + semantics:ROI + (1 | participant) + (1 | task/condition)	30.4	13
	PSC ~ zRT + semantics + ROI + zRT:semantics + semantics:ROI + (1 | participant) + (1 | task/condition)	30.7	14
	PSC ~ zRT + semantics + ROI + zRT:ROI + (1 | participant) + (1 | task/condition)	34.9	13
	PSC ~ zRT + semantics + ROI + zRT:semantics + zRT:ROI + (1 | participant) + (1 | task/condition)	35.2	14
	PSC ~ zRT + semantics + ROI + (1 | participant) + (1 | task/condition)	66.4	10
	PSC ~ zRT + semantics + ROI + zRT:semantics + (1 | participant) + (1 | task/condition)	66.8	11
	PSC ~ zRT + (1 | participant) + (1 | task/condition)	160.3	6

*Winning model; PSC percent signal change, zRT standardized response time, zER standardized error rate, AIC Akaike Information Criterion