PERCENTAGE CONSONANTS CORRECT (PCC)
IMITATIVE SENTENCE SCORING FORM
The abbreviated procedures below are based on the recommendations of Johnson, Weston, and Bain (2004) and Shriberg and
Kwiatkowski (1982):
1. Imitative samples of 36 sentences with appropriate mean length uerance (MLU) for the student’s age should be used.
Present sentences using a conversational tone without exaggerated prosodic cues (Johnson, Weston and Bain 2004).
2. Mark errors directly on the list of sentences for ecient scoring. Only consonants are scored, not vowels (i.e., only the
consonantal /r/ is scored).
3. Score only the first production of a consonant if a syllable is repeated (e.g., ba-balloon). Score only the first /b/.
4. Do not score consonants if a word is unintelligible or only partially intelligible.
5. Errors include substitutions, deletions, distortions, and additions. Voicing errors are only scored for
consonants in the initial position of words.
6. If /ng/ is replaced with /n/ at the end of a word, do not score it as an error. Likewise, minor sound changes due to informal
speech and/or selection of sounds in unstressed syllables are not scored as errors.
7. Dialectal variations are not scored as errors.
8. To determine the PCC value count the total number of consonant errors and use the formula below.
1. We see one big dog.
/wi si wΛn bɪg dɔg/
2. Mother talks on the
new phone.
/m ʌðɚ taks an ð ə nu
fon/
3. The baby has a prey
toy.
/ðe bebɪ hœz ə prɪtɪ
tɔɪ/
4. Mom says, “Sit down.”
/mɑm sεz sɪt dɑ℧n/
5. You’ll be fine with
teacher.
/j℧l bi fɑɪn wɪθ tɪt∫ɚ/
6. Oh no, the door shut!
/o℧ no℧ ðə dɔr ∫Λt/
7. She looks happy.
/∫i l℧ks hæpɪ/
8. Some kids are playing.
/sΛm kɪdz ɑr pleɪη/
9. She is looking in.
/∫i ɪz l℧kɪη ɪn/
10. Watch them dance.
/wat∫ ðεm dæns/
11. Now he can read.
/nɑ℧ hi kæn rid/
12. He took dinosaurs.
/hi t℧k dainəsɔrz/
13. Look, he can pull.
/l℧k he kæn p℧l/
14. They just made cars.
/ðeɪ ʤɪs meɪd kɑrz/
15. Everybody goes
around.
/εvrɪbədɪ goz ərɑ℧nd/
16. Now he wants water.
/nɑ℧ hi wΛnts wɑtɚ/
17. She fell down.
/∫i fεl dɑ℧n/
18. What is so funny?
/wΛt ɪz so fΛnɪ/
19. One boy went behind
the balls.
/wΛn bɔɪ wεnt
bɚhaɪnd ðə bɑlz/
20. She can’t get inside yet.
/∫i kænt gεt ɪnsɑɪd jεt/
21. I brought bugs and
things.
/ɑɪ brɔt bΛgz æn
θɪηz/
22. Pieces are all over.
/pisəz ɑr ɑl ovɚ/
23. He got cold.
/hi gɑt kold/
24. Time to clean up.
/tɑɪm tə klin Λp/
25. Put one flower on his
head.
/p℧t wΛn ɑ℧ɚ ɑn ɪz
hεd/
26. We want more food.
/wi wΛnt mɔr fud/
27. A lady climbed.
/ə ledɪ klɑimd/
28. All kids work.
/ɑl kɪdz wɝk/
29. Maybe this will move
now.
/mebɪ ðɪs wɪl muv
nɑ℧/
30. They are very tired.
/ðe ɑr vεrɪ tɑɪɚd/
31. We’ll rest awhile.
/wil rεst əwɑɪl/
32. He can open a door.
/hi kæn opən ə dɔr/
33. Come into the room.
/k℧m ɪntu ðə rum/
34. The dog is watching.
/ðə dɑg ɪz wɑt∫ɪη/
35. Move the bug o.
/muv ðə bΛg ɑf/
36. Time to go home.
/tɑɪm tə go hom/
273 Consonants
- /273
X100=
errors
=
Permission was granted by the American Speech-Language Hearing
Association to reprint Appendix B from Johnson, C. A. , Weston, A. D. , &
Bain, B. A. (2004). An objective and time-ecient method for determining
severity of childhood speech delay. American Journal of Speech-Language
Pathology, 13, 55–65.
Student/Child: Date of Birth:
PCC Probe Date:
SLP:
PCC SCORE:
