TY - JOUR
T1 - A diagnostic marker to discriminate childhood apraxia of speech from speech delay
T2 - IV. the pause marker index
AU - Shriberg, Lawrence D.
AU - Strand, Edythe A.
AU - Fourakis, Marios
AU - Jakielski, Kathy J.
AU - Hall, Sheryl D.
AU - Karlsson, Heather B.
AU - Mabie, Heather L.
AU - McSweeny, Jane L.
AU - Tilkens, Christie M.
AU - Wilson, David L.
N1 - Funding Information:
This research was supported by National Institute on Deafness and Other Communication Disorders Grant DC000496 and by a core grant to the Waisman Center from the National Institute of Child Health and Development (Grant HD03352). Authors Christie Tilkens and Heather Karlsson made the original observations and substantial continuing contributions leading to the development of the PM. We are grateful to the following colleagues and collaborators for their significant contributions to this research: Len Abbeduto, Nancy Alarcon, Becky Baas, Adriane Baylis, Richard Boada, Roger Brown, Stephen Camarata, Thomas Campbell, Richard Folsom, Lisa Freebairn, Jordan Green, Barbara Lewis, Christopher Moore, Katherine Odell, Bruce Pennington, Nancy Potter, Jonathan Preston, Erin Redle, Heather Leavy Rusiewicz, Alison Scheer-Cohen, Kristie Spencer, Ruth Stoeckel, Bruce Tomblin, Jennifer Vannest, and Emily White. We also thank the many participants, parents of participants, and research colleagues who have contributed significant insights into the needs and issues of diagnostic research in CAS.
Publisher Copyright:
© 2017 American Speech-Language-Hearing Association.
PY - 2017/4
Y1 - 2017/4
N2 - Purpose: Three previous articles provided rationale, methods, and several forms of validity support for a diagnostic marker of childhood apraxia of speech (CAS), termed the pause marker (PM). Goals of the present article were to assess the validity and stability of the PM Index (PMI) to scale CAS severity. Method: PM scores and speech, prosody, and voice precision-stability data were obtained for participants with CAS in idiopathic, neurogenetic, and complex neurodevelopmental disorders; adult-onset apraxia of speech consequent to stroke and primary progressive apraxia; and idiopathic speech delay. Three studies were completed including criterion and concurrent validity studies of the PMI and a temporal stability study of the PMI using retrospective case studies. Results: PM scores were significantly correlated with other signs of CAS precision and stability. The best fit of the distribution of PM scores to index CAS severity was obtained by dividing scores into 4 ordinal severity classifications: mild, mild-moderate, moderate-severe, and severe. Severity findings for the 4 classifications and retrospective longitudinal findings from 8 participants with CAS supported the validity and stability of the PMI. Conclusion: Findings support research and clinical use of the PMI to scale the severity of CAS.
AB - Purpose: Three previous articles provided rationale, methods, and several forms of validity support for a diagnostic marker of childhood apraxia of speech (CAS), termed the pause marker (PM). Goals of the present article were to assess the validity and stability of the PM Index (PMI) to scale CAS severity. Method: PM scores and speech, prosody, and voice precision-stability data were obtained for participants with CAS in idiopathic, neurogenetic, and complex neurodevelopmental disorders; adult-onset apraxia of speech consequent to stroke and primary progressive apraxia; and idiopathic speech delay. Three studies were completed including criterion and concurrent validity studies of the PMI and a temporal stability study of the PMI using retrospective case studies. Results: PM scores were significantly correlated with other signs of CAS precision and stability. The best fit of the distribution of PM scores to index CAS severity was obtained by dividing scores into 4 ordinal severity classifications: mild, mild-moderate, moderate-severe, and severe. Severity findings for the 4 classifications and retrospective longitudinal findings from 8 participants with CAS supported the validity and stability of the PMI. Conclusion: Findings support research and clinical use of the PMI to scale the severity of CAS.
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U2 - 10.1044/2016_JSLHR-S-16-0149
DO - 10.1044/2016_JSLHR-S-16-0149
M3 - Article
C2 - 28384662
AN - SCOPUS:85017507946
SN - 1092-4388
VL - 60
SP - S1153-S1169
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
IS - 4
ER -