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A rising or unstable baseline can complicate the interpretation of single-case data. Schematic example adapted from “Investigating the use of traditional and spectral biofeedback approaches to intervention for /r/ misarticulation,” by T. McAllister Byun and E. Hitchcock, 2012, American Journal of Speech-Language Pathology, 21, pp. 207–221. Copyright © 2012 by American Speech-Language-Hearing Association. Adapted with permission.
