Table 1.

Descriptive statistics

Measure	Group	N	Mean	S.D.	Min.	Max.
EA delta	Crystals	33	−0.03	0.21	−0.39	0.40
	Bastion	40	0.03	0.25	−0.43	0.47
EC delta	Crystals	31	0.06	2.57	−6	5
	Bastion	39	0.03	2.49	−5	6
VMPFC – Amygdala rs-fMRI delta	Crystals	31	0.10	0.43	−0.75	0.88
	Bastion	33	−0.03	0.28	−0.76	0.54
DMPFC – Amygdala rs-fMRI delta	Crystals	30	0.10	0.43	−0.83	1.20
	Bastion	33	0.04	0.35	−0.79	0.83
RTPJ EA-related activation delta	Crystals	33	−0.02	0.66	−1.75	1.69
	Bastion	39	−0.05	1.13	−3.55	1.83
VMPFC EA-related activation delta	Crystals	33	−0.03	1.08	−3.04	3.15
	Bastion	38	−0.26	1.43	−5.27	2.67
DMPFC EA-related activation delta	Crystals	33	−0.29	0.56	−2.09	0.85
	Bastion	39	0.05	1.00	−3.14	3.15
Emotion identification first tries	Crystals	33	54.0	12.0	27	74
Emotion intensity first tries	Crystals	33	29.6	10.4	14	60
Game engagement	Crystals	33	0.06	0.92	−1.72	2.24
Total time playing Crystals	Crystals	33	220.2	53.2	121.0	334.1
Number taser uses	Crystals	33	19.3	18.0	3	103
Number quests completed	Crystals	33	36.1	6.7	19	57

Descriptive statistics by group for all variables used in analysis. S.D. standard deviation, Min. minimum, Max. maximum, delta, time 2 – time 1 difference, EA empathic accuracy, EC self-reported empathic concern, rs-fMRI resting state functional magnetic resonance imaging, VMPFC ventromedial prefrontal cortex, DMPFC dorsomedial prefrontal cortex, RTPJ right temporoparietal junction