Table 1.

Consonant equivalence classes used for scoring pre- and post-training CVCVC consonant identification response.

Consonant position	Percent within-cluster confusions	Equivalence class groups
Initial	82.9	[l] [C J S d h g k n s z t y] [w r] [D T][f v] [b p m]
Medial	78.0	[C J S Z] [d h g k l n s z t y] [w] [D T] [b p m] [f v]
Final	77.3	[m][b p][D T][f v] [C J S Z] [d g k ln s z t G]

Groupings were derived based on clustering of consonant confusions with CVCVC nonsense words. Consonant notation is ARPABET. Percent within-cluster confusions are listed for the lowest level clustering. (Initial = initial consonant; Medial = medial consonant; Final = final consonant).