Table 5.

Group activations for the decrease > increase onset contrast. Regions that were present in the Condition X Phase Interaction examining the onset and elaboration phases are noted in the last column with the distance between the peak evident in the t-test and the interaction.

Lobe/Region	BA	H	Talairach			t	k	Condition X Phase Interaction
			x	y	z
Decrease > Increase Onset
Frontal
Inferior frontal gyrus	9	L	−44	15	23	9.08	1812
	47	L	−34	28	−15	6.96	77	5 mm**
	9	R	38	7	29	5.20	16	5 mm* and 3 mm**
	46	R	51	28	15	5.09	26	6 mm*
Middle frontal gyrus	11	R	30	34	−19	7.57	64	5 mm*
	6	L	−34	12	53	4.87	6
Medial frontal gyrus	6	L	−18	10	53	4.42	5
	6	R	10	5	64	4.29	6
Superior frontal gyrus	8	L	−6	14	49	9.78	477	6 mm*
	6	L	−12	22	52	5.16	6
	6	R	12	8	53	4.82	30
Precentral gyrus	4	L	−58	−19	43	4.46	11
	6	L	−40	−13	58	4.35	9
Temporal
Middle temporal gyrus	39	L	−57	−62	12	8.41	337	11 mm* and 12 mm**
	39	L	−42	−72	29	4.69	7
Fusiform gyrus	37	L	−32	−45	−15	7.41	2197
	37	R	38	−61	−9	7.64	56
	37	R	44	−45	−10	4.21	5
Parahippocampal gyrus	30	R	24	−52	3	4.29	7
Occipital
Cuneus	18	R	14	−71	15	6.87	70
	30	L	−14	−66	9	6.33	127	8 mm*
Superior occipital gyrus	39	R	32	−68	29	5.52	46	3 mm*
Parietal
Inferior parietal lobe	40	R	36	−56	45	6.81	93	4 mm* and 10 mm**
	40	R	42	−43	41	4.15	5
Superior parietal lobe	7	L	−24	−52	41	6.23	388
	7	L	−24	−61	53	5.28	35
Precuneus	19	L	−34	−76	35	5.21	67
	7	L	−10	−70	40	4.31	7
Limbic
Cingulate gyrus	31	L	−4	−39	42	5.44	41
	23	R	4	−33	29	5.58	71	7 mm*
	32	L	−4	25	32	4.52	21
	30	R	16	−56	8	5.47	60
Other
Cerebellum		L	−8	−79	−25	6.34	83	9 mm**
Thalamus		L	−6	−15	6	4.98	28
		R	8	−13	8	4.15	6
Increase > Decrease Onset
Temporal
Superior temporal gyrus	22	R	63	−25	7	5.81	11

^*Present in the (decrease onset > decrease elaboration) > (increase onset > increase elaboration) interaction contrast.

^**Present in the (decrease onset > decrease instruction) > (increase onset > increase instruction) interaction contrast.