Table 1 Descriptive statistics for SCT and TD group

Cognitive development

 Norm score; Bayley-III

1–2 years

60

1

80–125

100.39 (12.18)

72–129

99.48 (14.32)

F(1,58) = 0.70, p = .793; η_p ²= .01

Total IQ

 WPPSI-III

3–7 years

131

7

55–138

95.48 (19.88)

72–140

109.01 (13.27)

F(1,129) = −21.37, p < .001; η_p ²= .14

Receptive language

 Standard score; PPVT-III

3–7 years

135

3

65–129

99.26 (14.94)

74–133

108.67 (12.44)

F(1,133) = −15.86, p < .001; η_p ²= .11

Eye gaze to static faces

 Proportion first fixations

1–7 years

181

18

83.3% (angry condition: 78.5%; happy condition: 88.1%)

.00–1.00

.58 (.24)

.00–1.00

.63 (.27)

F(1,179) = −1.83, p = .089; η_p ²= .01

Eye gaze to static faces

 Proportion fixation    duration

1–7 years

181

18

.00–.69

.32 (.17)

.00–.73

.35 (.20)

F(1,177) = −0.81, p =.185; η_p ²= .01

Eye gaze patterns to single and multiple faces

 Proportion fixation duration

1–7 years

188

11

SF: face

85.3%

.01–.79

.46 (.17)

.04–.83

.51 (.19)

F(1,186) = −4.66, p = .016; η_p ²= .02

SF: eyes

.00–.59

.21 (.13)

.00–.61

.23 (.15)

F(1,186) = −1.48, p =.113; η_p ²= .01

MF: faces

81.5%

.04–.79

.51 (.16)

.04–.80

.57 (.19)

F(1,186) = −5.35, p = .011; η_p ²= .03

MF: eyes

.00–.45

.14 (.11)

.00–.57

.18 (.13)

F(1,186) = −4.56, p = .017; η_p ²= .02

Affect recognition

 Raw score; NEPSY-II

3–7 years

130

8

1–23

12.07 (4.58)

1–23

13.64 (4.86)

F(1,128) = −3.58, p = .031; η_p ²= .03