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Table 3.

Coordinates of Peak Decoding in the Searchlight Analyses of Rule Coding

Condition	Lobe	Cluster	Hemisphere	Coordinates			BA	t Score	Cluster Extent
Condition	Lobe	Cluster	Hemisphere	x	y	z	BA	t Score	Cluster Extent
Easy	Frontal	Orbital frontal cortex	Left	11	−18	50	−6	4.49	36
	Parietal	Precuneus	Bilateral	7	−4	−70	52	5.55	1503
	Occipital	Primary visual cortex	Right	17	18	−100	−4	4.48	213
	Occipital	Primary visual cortex	Left	17	−10	−102	4	4.10	47
	Temporal	Anterior fusiform gyrus	Left	36	−34	−2	−28	3.91	35
Hard	Frontal	Lateral frontal cortex (IFS)	Left	47/45	−34	38	6	5.04	97
		Lateral frontal cortex (IFS)	Right	45	50	40	8	5.38	424
		Anterior cingulate	Right	32	8	52	24	3.85	30
	Parietal	Precuneus	Right	30	14	−48	18	3.87	60
	Occipital	Extrastriate cortex	Bilateral	19/18	−28	−78	28	4.85	1340
	Occipital	Extrastriate cortex	Right	19	36	−80	38	4.32	215
	Subcortical	Cerebellum	Right	–	12	−68	−24	4.13	138
	Subcortical	Caudate nucleus	Left	–	−16	8	26	4.11	58
Hard minus easy	Frontal	Lateral frontal cortex (IFS)	Right	45	46	38	12	4.35	103
Hard minus easy	Subcortical	Caudate nucleus	Left	–	−16	14	20	3.98	98

Condition	Lobe	Cluster	Hemisphere	Coordinates			BA	t Score	Cluster Extent
Condition	Lobe	Cluster	Hemisphere	x	y	z	BA	t Score	Cluster Extent
Easy	Frontal	Orbital frontal cortex	Left	11	−18	50	−6	4.49	36
	Parietal	Precuneus	Bilateral	7	−4	−70	52	5.55	1503
	Occipital	Primary visual cortex	Right	17	18	−100	−4	4.48	213
	Occipital	Primary visual cortex	Left	17	−10	−102	4	4.10	47
	Temporal	Anterior fusiform gyrus	Left	36	−34	−2	−28	3.91	35
Hard	Frontal	Lateral frontal cortex (IFS)	Left	47/45	−34	38	6	5.04	97
		Lateral frontal cortex (IFS)	Right	45	50	40	8	5.38	424
		Anterior cingulate	Right	32	8	52	24	3.85	30
	Parietal	Precuneus	Right	30	14	−48	18	3.87	60
	Occipital	Extrastriate cortex	Bilateral	19/18	−28	−78	28	4.85	1340
	Occipital	Extrastriate cortex	Right	19	36	−80	38	4.32	215
	Subcortical	Cerebellum	Right	–	12	−68	−24	4.13	138
	Subcortical	Caudate nucleus	Left	–	−16	8	26	4.11	58
Hard minus easy	Frontal	Lateral frontal cortex (IFS)	Right	45	46	38	12	4.35	103
Hard minus easy	Subcortical	Caudate nucleus	Left	–	−16	14	20	3.98	98

The table shows peak decoding of rule for easy and hard rules separately and peaks where coding was significantly stronger for hard relative to easy rules. There were no significant voxels showing stronger coding of easy rules than hard rules. Results are thresholded at p < .001 (uncorrected) with an extent threshold of 20 voxels.

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