Table 4.

Normalized frequencies of phonologic error types across sensitive tasks and all tasks

Error type across tasks	Normalized frequency of errors/Mean (SD) (percent)	Range of normalized frequencies (percent)
Sensitive tasks
Substitution errors	21.1 (16.5)	2.7 to 58.3
Omission errors	14.8 (12.2)	0.0 to 39.6
Addition errors	10.0 (9.4)	0.0 to 33.3
Transposition errors	1.2 (1.4)	0.0 to 4.8
All tasks
Substitution errors	7.8 (6.9)	1.1 to 27.8
Omission errors	5.4 (5.4)	0.0 to 18.4
Addition errors	3.4 (3.9)	0.0 to 16.5
Transposition errors	0.4 (0.5)	0.0 to 1.7