Masked Visual Analysis: Minimizing Type I Error in Visually Guided Single-Case Design for Communication Disorders

Autor/inn/en	Byun, Tara McAllister; Hitchcock, Elaine R.; Ferron, John
Titel	Masked Visual Analysis: Minimizing Type I Error in Visually Guided Single-Case Design for Communication Disorders
Quelle	In: Journal of Speech, Language, and Hearing Research, 60 (2017) 6, S.1455-1466 (12 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2017_JSLHR-S-16-0344
Schlagwörter	Communication Disorders; Error Correction; Error Analysis (Language); Intervention; Research Design; Research Methodology; Research Problems; Experimenter Characteristics; Case Studies; Tutorial Programs; Hypothesis Testing; Dialects + Suchen Sie Ihr Suchwort? Kommunikationsstörung; Korrektur; Error analysis; Language; Fehleranalyse; Forschungsdesign; Research method; Forschungsmethode; Forschungskritik; Case study; Fallstudie; Case Study; Tutorial programmes; Förderprogramm; Lernprogramm; Tutorensystem; Hypothesenprüfung; Hypothesentest; Dialect; Dialekt
Abstract	Purpose: Single-case experimental designs are widely used to study interventions for communication disorders. Traditionally, single-case experiments follow a response-guided approach, where design decisions during the study are based on participants' observed patterns of behavior. However, this approach has been criticized for its high rate of Type I error. In masked visual analysis (MVA), response-guided decisions are made by a researcher who is blinded to participants' identities and treatment assignments. MVA also makes it possible to conduct a hypothesis test assessing the significance of treatment effects. Method: This tutorial describes the principles of MVA, including both how experiments can be set up and how results can be used for hypothesis testing. We then report a case study showing how MVA was deployed in a multiple-baseline across-subjects study investigating treatment for residual errors affecting rhotics. Strengths and weaknesses of MVA are discussed. Conclusions: Given their important role in the evidence base that informs clinical decision making, it is critical for single-case experimental studies to be conducted in a way that allows researchers to draw valid inferences. As a method that can increase the rigor of single-case studies while preserving the benefits of a response-guided approach, MVA warrants expanded attention from researchers in communication disorders. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01