Table 1.

Background data for WS participants

	Mean (s.d.)	Range
CA of WS Sample (N = 17)	30.6 (11.3)	14.9–52.3
Wechsler Full Scale IQa	67.5 (10.0)	47–82
Wechsler Verbal IQa	72.8 (7.8)	59–89
Wechsler Performance IQa	64.4 (10.3)	44–83
PPVT-III (Verbal: Receptive Vocabulary) Age Equivalent	12.6 (4.5)	5.8–22
VMI (Nonverbal: Figure Drawing) Age Equivalent	5.9 (1.6)	4.1–11.3

^aWAIS-R in all but two cases (for these participants, the WISC-R was used). IQ scores are standard scores, which have a mean of 100 and a s.d. of 15.