PURPOSE: The purpose of the study was to determine whether distinct subgroups of preschool children with speech sound disorders (SSD) could be identified using a subgroup discovery algorithm (SUBgroup discovery via Alternate Random Processes, or SUBARP). Of specific interest was finding evidence of a subgroup of SSD exhibiting performance consistent with atypical speech motor control. METHOD: Ninety-seven preschool children with SSD completed speech and nonspeech tasks. Fifty-three kinematic, acoustic, and behavioral measures from these tasks were input to SUBARP. RESULTS: Two distinct subgroups were identified from the larger sample. The 1st subgroup (76%; population prevalence estimate = 67.8%-84.8%) did not have characteristics that would suggest atypical speech motor control. The 2nd subgroup (10.3%; population prevalence estimate = 4.3%-16.5%) exhibited significantly higher variability in measures of articulatory kinematics and poor ability to imitate iambic lexical stress, suggesting atypical speech motor control. Both subgroups were consistent with classes of SSD in the Speech Disorders Classification System (SDCS; Shriberg et al., 2010a). CONCLUSION: Characteristics of children in the larger subgroup were consistent with the proportionally large SDCS class termed speech delay; characteristics of children in the smaller subgroup were consistent with the SDCS subtype termed motor speech disorder-not otherwise specified. The authors identified candidate measures to identify children in each of these groups.
PURPOSE: The purpose of the study was to determine whether distinct subgroups of preschool children with speech sound disorders (SSD) could be identified using a subgroup discovery algorithm (SUBgroup discovery via Alternate Random Processes, or SUBARP). Of specific interest was finding evidence of a subgroup of SSD exhibiting performance consistent with atypical speech motor control. METHOD: Ninety-seven preschool children with SSD completed speech and nonspeech tasks. Fifty-three kinematic, acoustic, and behavioral measures from these tasks were input to SUBARP. RESULTS: Two distinct subgroups were identified from the larger sample. The 1st subgroup (76%; population prevalence estimate = 67.8%-84.8%) did not have characteristics that would suggest atypical speech motor control. The 2nd subgroup (10.3%; population prevalence estimate = 4.3%-16.5%) exhibited significantly higher variability in measures of articulatory kinematics and poor ability to imitate iambic lexical stress, suggesting atypical speech motor control. Both subgroups were consistent with classes of SSD in the Speech Disorders Classification System (SDCS; Shriberg et al., 2010a). CONCLUSION: Characteristics of children in the larger subgroup were consistent with the proportionally large SDCS class termed speech delay; characteristics of children in the smaller subgroup were consistent with the SDCS subtype termed motor speech disorder-not otherwise specified. The authors identified candidate measures to identify children in each of these groups.
Authors: Jennell C Vick; Thomas F Campbell; Lawrence D Shriberg; Jordan R Green; Hervé Abdi; Heather Leavy Rusiewicz; Lakshmi Venkatesh; Christopher A Moore Journal: J Neurophysiol Date: 2012-02-22 Impact factor: 2.714
Authors: Thomas F Campbell; Christine A Dollaghan; Howard E Rockette; Jack L Paradise; Heidi M Feldman; Lawrence D Shriberg; Diane L Sabo; Marcia Kurs-Lasky Journal: Child Dev Date: 2003 Mar-Apr
Authors: Lawrence D Shriberg; Thomas F Campbell; Heather B Karlsson; Roger L Brown; Jane L McSweeny; Connie J Nadler Journal: Clin Linguist Phon Date: 2003 Oct-Nov Impact factor: 1.346
Authors: Lawrence D Shriberg; Edythe A Strand; Marios Fourakis; Kathy J Jakielski; Sheryl D Hall; Heather B Karlsson; Heather L Mabie; Jane L McSweeny; Christie M Tilkens; David L Wilson Journal: J Speech Lang Hear Res Date: 2017-04-14 Impact factor: 2.297
Authors: Elizabeth Roepke; Kathryn E Bower; Catherine A Miller; Françoise Brosseau-Lapré Journal: J Speech Lang Hear Res Date: 2020-07-08 Impact factor: 2.297
Authors: Barbara A Lewis; Lisa Freebairn; Jessica Tag; Robert P Igo; Allison Ciesla; Sudha K Iyengar; Catherine M Stein; H Gerry Taylor Journal: Am J Speech Lang Pathol Date: 2019-10-10 Impact factor: 2.408
Authors: Beate Peter; Ellen M Wijsman; Alejandro Q Nato; Mark M Matsushita; Kathy L Chapman; Ian B Stanaway; John Wolff; Kaori Oda; Virginia B Gabo; Wendy H Raskind Journal: PLoS One Date: 2016-04-27 Impact factor: 3.240