Table 1.

Averaged group performance for the psychometric measures used in the study

Measure (units)	Mean (SD)
Age (months)	118.4  (4.5)
BAS average (t-score)	51.9  (6.0)
BAS reading (t-score)	55.8 (10.6)
BAS spelling (t-score)	52.5  (7.5)
Exception word naming (% correct)	65.0 (15.8)
Nonword naming (% correct)	73.6 (20.2)
Spoonerisms (% correct)	62.3 (20.9)
Pseudohomophone identification (% correct)	82.6 (12.2)
2-Hz FM detection (mod. index)	4.4  (2.8)
240-Hz FM detection (mod. index)	4.1  (2.8)
Coherent motion detection (% coherence)	18.6 (10.0)