Table 2.

Means (SD), difference score, effect sizes and 95% confidence intervals (CI), and summary statistics for one-way between groups Anova for treatment and Waitlist control groups

	Means (SD) [95% CI]		Group difference
	Treatment (n = 19)	Waitlist control (n = 17)	F	p
Theory of Mind total score (max score = 72)
Time 1	50.89 (5.31)	54.00 (5.93)
Time 2	58.21 (4.00)	58.00 (5.78)
Difference score	7.31 [5.20, 9.42]	4.00 [1.69, 6.31]	5.01	.03
Effect size	1.49	.79
Theory of Mind precursors (max score = 22)
Time 1	18.05 (1.51)	17.94 (1.89)
Time 2	19.37 (1.38)	19.05 (1.71)	.11	.75
Difference score	1.32 [.34, 2.29]	1.11 [.31, 1.93]
Effect size	.58	.63
Elementary Theory of Mind (max score = 38)
Time 1	25.10 (3.30)	27.59 (3.12)
Time 2	29.84 (2.36)	29.24 (3.70)
Difference score	4.74 [3.44, 6.03]	1.64 [−.14, 3.44]	9.00	.005
Effect size	1.58	.42
Advanced Theory of Mind scale (max score = 12)
Time 1	7.44 (1.00)	8.47 (1.91)
Time 2	9.00 (2.11)	9.71 (1.45)	.00	.95
Difference score	1.26 [.69, 1.83]	1.23 [.52, 1.95]
Effect size	.95	.79
LEAS-C total (max score = 48)
Time 1	32.89 (8.64)	31.53 (5.95)
Time 2	37.72 (10.73)	33.47 (6.40)
Difference score	4.83 [−1.04,10.71]	1.94 [−.89,4.78]	.84	.37
Effect size	.36	.31
LEAS-C mixed emotions (max score = 36)
Time 1	1.83 (1.72)	2.94 (3.11)
Time 2	4.72 (5.40)	2.24 (3.19)
Difference score	2.89 [.22,5.56]	−.71 [−1.95,.53]	6.39	.02
Effect size	.48	.26
LEAS-C complex emotions (max score = 36)
Time 1	1.89 (2.87)	4.52 (4.45)
Time 2	4.16 (4.40)	1.71 (3.06)	13.26	.001
Difference score	2.28 [.42,4.13]	−2.82 [−5.16,−.49]
Effect size	.54	.26
Self reported empathy (max score = 10)
Time 1	3.95 (2.07)	4.65 (2.18)
Time 2	4.00 (2.62)	4.41 (2.11)
Difference score	.05 [−1.25,1.35]	−.24 [−1.79,1.32]	.09	.77
Effect size	.02	.07
CSBQ (max score = 98)
Time 1	36.67 (14.76)	42.94 (13.77)
Time 2	34.80 (17.60)	40.00 (14.54)
Difference score	−1.87 [−8.48, 4.74]	−2.94 [−12.41, 6.51]	.04	.84
Effect size	.14	.16