Table 1.

Demographic details of the two subject groups

HV groupLV group
N13 (7 males)19 (13 males)
Mean age13.8 (1.1)13.8 (1.0)
Mean full-scale intelligence (IQ)***118.5 (11.1)104.3 (15.2)
Mean nonverbal IQ109.8 (10.9)105.9 (17.4)
Mean verbal IQ**121.8 (12.6)101.8 (13.0)
Vocabulary**46.7 (5.5)38.7 (6.8)
Alliteration fluency*18.1 (5.0)14.4 (4.7)
Rhyme fluency*15.7 (4.4)10.1 (4.7)
  • HV, Higher verbal abilities; LV, lower verbal abilities. SD values are presented in parentheses.

  • Significant differences between groups (as determined by independent sample t test) are indicated as follows:

  • *p < 0.05,

  • **p < 0.01, and

  • ***p < 0.001.