The authors would like to apologize for a typographical error on page 1005. In Table 1, the data for socioeconomic status (SES), line 3, is incorrect. The corrected Table should read:
Note: Scores represent means, standard deviation and range.
a SES=socioeconomic status, assessed with the Hollingshead Four-Factor index.
b IQ assessed with Wechsler Scales (WISC-III or WAIS-III).
c PPVT-3 (Peabody Picture Vocabulary Test, 3rd edn), Scaled Score.
d PPVT-3 Raw score.