Phoneme Discrimination Task.

<p>d’ values for each phoneme discrimination test for each of the groups and the averaged easy condition individually chosen for each participant. A paired t-test confirmed our hypotheses that (1): good performers were significantly better in phoneme discrimination than bad performers (3 out of 4 subtests); (2): the good performer would score equally high compared to healthy controls (3 out of 4 subtests); and (3) that bad performers would show lower performance than controls (3 out of 4 subtests). This was indicated by t-values ranging from 1.7 to 15.21 and p-values ranging from 0.05 (marked by an asterisk) to ≤0.01 (marked by two or more asterisks).