Table 1.

Mean and median chronological age, non-verbal intelligence and reading age for the three groups compared

Group	No.	Chronological Age		Non-Verbal Mentation (Ravens IQ)		Reading Age
		M	SE	M	SE	M	SE
DD	17	11.7	0.4	95*	2	7.6**	0.3
CA	46	11.5	0.1	105	2	12.8	0.2
RA	16	8.1	0.1	106	3	8.5**	0.4

DD = developmental dyslexia; CA = Chronological age matched; RA = reading age matched.

Symbols denote significantly different from CA group.

(* = p < .01; ** = p < .0001).