Using Statistical Process Control Charts to Study Stuttering Frequency Variability during a Single Day

Autor/inn/en	Karimi, Hamid; O'Brian, Sue; Onslow, Mark; Jones, Mark; Menzies, Ross; Packman, Ann
Titel	Using Statistical Process Control Charts to Study Stuttering Frequency Variability during a Single Day
Quelle	In: Journal of Speech, Language, and Hearing Research, 56 (2013) 6, S.1789-1799 (11 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Stuttering; Adults; Charts; Statistical Analysis; Measurement Techniques; Syllables; Suprasegmentals; Scores; Correlation; Statistical Significance; Severity (of Disability) + Suchen Sie Ihr Suchwort? Stammer; Stottern; Diagram; Diagrams; Diagramm; Tabellarische Überischt; Tabelle; Statistische Analyse; Messtechnik; Silbe; Korrelation; Schweregrad
Abstract	Purpose: Stuttering varies between and within speaking situations. In this study, the authors used statistical process control charts with 10 case studies to investigate variability of stuttering frequency. Method: Participants were 10 adults who stutter. The authors counted the percentage of syllables stuttered (%SS) for segments of their speech during different speaking activities over a 12-hr day. Results for each participant were plotted on control charts. Results: All participants showed marked variation around mean stuttering frequency. However, there was no pattern of that variation consistent across the 10 participants. According to control charts, the %SS scores of half the participants were indicative of unpredictable, out-of-control systems, and the %SS scores of the other half of the participants were not. Self-rated stuttering severity and communication satisfaction correlated significantly and intuitively with the number of times participants exceeded their upper control chart limits. Conclusions: Control charts are a useful method to study how %SS scores might be applied to the study of stuttering variability during research and clinical practice. However, the method presents some practical problems, and the authors discuss how those problems can be solved. Solving those problems would enable researchers and clinicians to better plan, conduct, and evaluate stuttering treatments. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10