TABLE 1.

Descriptive statistics for reading speed and accuracy as a function of group.

	DD		TDR		Cohen’s d
Measure	M	SD	M	SD
Length RTs (ms)
Word 3 letters	703.96	153.07	553.66	72.59	1.25
Word 5 letters	751.8	209.06	559.71	71.95	1.23
Word 7 letters	846.4	250.41	568.71	66.76	1.51
NW 3 letters	853.86	335.17	587.76	80.79	1.09
NW 4 letters	936.09	355.84	609.59	110.02	1.24
NW 5 letters	1084.44	496.72	620.01	114.88	1.29
NW 6 letters	1176.076	592.01	628.56	116.33	1.28
Length accuracy (%)
Word 3 letters	95	4	97	2	0.63
Word 5 letters	91	6	95	2	0.89
Word 7 letters	90	8	95	3	0.83
NW 3 letters	87	14	95	4	0.78
NW 4 letters	87	14	95	4	0.78
NW 5 letters	82	18	95	4	1
NW 6 letters	87	13	96	6	0.89
Frequency RTs (ms)
HF 3 letters	665.90	143.22	544.02	75.07	1.06
HF 5 letters	696.04	177.13	552.95	74.84	1.05
HF 7 letters	729.78	206.74	545.23	65.83	1.20
LF 3 letters	744.78	169.93	563.78	74.80	1.38
LF 5 letters	819.58	262.71	567.83	76.67	1.30
LF 7 letters	998.56	358.18	595.54	74.20
Frequency accuracy (%)
HF 3 letters	98	1	98	1	0
HF 5 letters	97	3	99	1	0.89
HF 7 letters	98	2	99	1	0.63
LF 3 letters	92	8	96	3	0.66
LF 5 letters	85	9	92	6	0.91
LF 7 letters	83	15	91	7	0.68

TDR, typically developing readers; DD, developmental dyslexics; HF, high frequency; LF, low frequency; NW, non-words; and RTs, reaction times in milliseconds (ms).