Table 2.

Group differences in mean fixation percentages

	ASD		TD		Group difference		Effect size
	Mean	SD	Mean	SD	t	p	Cohen’s d
Face
Without mouth motion
% Eye	39.1	27.5	79.1	20.6	5.26	< .001*	1.74	b
% Mouth	19.4	16.5	9.1	10.8	2.19	.039	.79	a
With mouth motion
% Eye	28.6	30.5	55.1	22.0	3.20	.003*	1.06	b
% Mouth	33.8	32.4	24.8	17.6	1.01	.323	.38
Biological motion
% Upright	40.7	17.7	55.4	18.7	2.48	.018*	.82	b
% Inverted	45.7	21.7	43.6	18.6	.32	.747	.11
People and geometry
% People	46.3	19.1	75.7	13.8	5.67	< .001*	1.88	b
% Geometry	40.4	24.5	23.2	13.8	2.56	.018*	.94	b

* p < .025 (= .05/2)

^aModerate effect size (> .50)

^bHigh effect size (> .80) [83]