Table 1.

Characteristics of the sample and in-scanner behavioral performance

	Age (years)	IQ	Developmental agea	Percent correct	Mean response time (ms)	Percent FMRP
FXS subject
1	19.2	65	12.48	87.50	787.75	37
2	19.4	76	14.74	81.25	977.00	27
3	21.6	71	15.34	81.25	1048.88	22.5
4	24.0	84	20.16	100.00	1033.50	62
5	19.0	80	15.22	–b	–b	81
6	22.8	84	19.15	68.75	835.48	57.5
7	11.4	95	10.83	62.50	1014.56	64.5
8	16.7	95	15.86	68.75	599.13	70.5
9	18.3	89	16.29	100.00	826.75	39
10	14.3	124	17.77	81.25	899.58	62
TD subject
1	18.7	111	20.76	87.5	874.61	–c
2	13.9	107	14.02	56.25	878.75	–
3	19.6	102	19.98	68.75	861.75	–
4	14.5	121	17.53	68.75	875.59	–
5	11.2	117	13.09	93.75	980.12	–
6	12.3	119	14.64	87.5	1509.84	–
7	15	112	16.78	56.25	1128.72	–
8	15.8	112	17.71	100	1090.48	–
9	15.8	84	13.23	62.5	994.39	–
10	10.58	117	10.18	100	687.88	–

^aDevelopmental age = chronological age × IQ/100

^bButton box malfunction

^cNot applicable