Table 1.

Study 1 Demographic Data

	FXS						CA Match					MA Match
	N	Mean	Median	SD	Min	Max	N	Mean	Median SD	Min	Max	N	Mean	Median	SD	Min	Max
Age in Years	14	4.05	3.99	0.93	2.88	5.84	14	4.17	4.06 0.30	3.86	4.82	14	2.93	2.94	0.10	2.77	3.12
aMental Age	14	2.49	2.32	0.51	2.04	3.79	14	4.42	4.43 0.63	3.35	5.50	14	2.77	2.76	0.18	2.44	3.02
bAttention Raw	14	5.21	5	2.01	3	9	11	2.00	2 1.36	0	4	14	1.71	2	1.77	0	5
bAttention T	14	62.43	62	8.22	53	77	11	52.18	51 2.71	50	57	14	52.36	51	3.69	50	62
cProportion Failed Trials	14	0.27	0.17	0.30	0.00	0.67	14	0.00	0.00 0.00	0.00	0.00	14	0.05	0.00	0.18	0.00	0.67

^aMullen Scales of Early Learning (Mullen, 1995)

^bChild Behavior Checklist (Achenbach & Rescorla, 2000)

^cProportion of failed trials within the snack delay task. Participants who passed all 6 trials “passed” the overall task.