ASD Group

(N = 59)

PDD-NOS Group

(N = 44)

Non-ASD Clinical Diagnosis Group

(N = 68)

Age (years)

M = 3.63; SD = 0.74^a

M = 3.58; SD = 0.81^b

M = 3.92; SD = 0.75^ab

African-American (%)

17%^c

10%^d

35%^cd

Asian-American (%)

2%

2%

0%

Caucasian (%)

76%

83%^e

62%^e

Hispanic (%)

0%

2%

3%

Native American (%)

2%

2%

0%

Other

3%

0%

0%

Maternal Education (% with BA)

55%

46%

43%^¥

SES

M = 33.64; SD = 20.22^*f

M = 31.05; SD = 19.66^†g

M = 43.66; SD = 23.20‡^fg

Sex (% male)

81%

82%

71%

SSI

M = 70.54; SD = 26.18^hi

M = 83.75; SD = 24.86^ij

M = 106.09; SD = 24.86^hj