Table 1 Neuroimaging results of univariate activation analysis (p_uncorr < 0.001 at voxel level, cluster-level p_FWE < 0.05).

Contrast	Region	Cluster Size	Hemisphere	MNI coordinates			Z
Contrast	Region	Cluster Size	Hemisphere	x	y	z	Z
Gratitude vs. Joy	No suprathreshold clusters
Emotion by intention interaction^a	No suprathreshold clusters
Emotion by value interaction^b	Cuneus/precuneus, BA19/7	81	Left	−6	−87	33	4.10
	Precuneus/SPL, BA6/7/4/5	420^†	Left/Right	0	−48	69	3.91
	Calcarine/precuneus, BA30/29/19	127^†	Left	−6	−45	12	3.77
	STG/MTG, BA41/42/22/40	287^†	Left	−69	−27	3	3.52
Three-way interaction^c	Putamen/pallidum, BA13	61	Left	−24	−9	−6	4.36
	IOG/fusiform/ITG, BA18/19/37	102	Right	33	−78	−15	4.12
	DLPFC (MFG/IFG), BA46/9/10	270^†	Right	45	36	15	3.69
Gratitude < Joy by linear modulation of emotion rating	STG, BA41/13	96	Left	−48	−15	12	4.38
Gratitude vs. Joy by linear modulation of intention	No suprathreshold clusters
Gratitude vs. Joy by quadratic modulation of intention	No suprathreshold clusters
Gratitude vs. Joy by linear modulation of value	No suprathreshold clusters

^†p_uncorr < 0.005; SPL, superior parietal lobule; STG, superior temporal gyrus; MTG, middle temporal gyrus; IOG, inferior occipital gyrus; ITG, inferior temporal gyrus; DLPFC, dorsolateral prefrontal cortex; MFG, middle frontal gyrus; IFG, inferior frontal gyrus.
^aGratitude_(Intention_Strong − 1/2Intention_Weak – 1/2Intention_No) > Joy_(Intention_Strong − 1/2Intention_Weak – 1/2Intention_No).
^bGratitude_(1/2Value_Low + 1/2Value_Zero − Value_High) > Joy_(1/2Value_Low + 1/2Value_Zero − Value_High).
^cGratitude_[(Value_Low/Zero_Intention_Strong − Value_High_Intention_Strong) − (Value_Low/Zero_Intention_Weak/No − Value_High_Intention_Weak/No)] > Joy_[(Value_Low/Zero_Intention_Strong − Value_High_Intention_Strong) − (Value_Low/Zero_Intention_Weak/No − Value_High_Intention_Weak/No)], where Value_Low/Zero = 1/2(Value_Low + Value_Zero), and Intention_Weak/No = 1/2(Intention_Weak + Intention_No).

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