| Summary: | Efficacy research has been the focus of many phonological intervention projects recently
(Bernhardt, 1990,1994; Von Bremen, 1990; Howell & Dean, 1995). The importance of conducting
efficacy research is not in dispute; rather, researchers are focusing on how outcomes can be
optimized in everyday clinical situations with typical clinicians given time and financial
constraints (Fletcher, Fletcher & Wagner, 1988). The purpose of the present study was to optimize
and evaluate the effectiveness of nonlinear phonological theory in typical clinical practise.
Intervention took place in bi-weekly sessions over a period of 16 weeks. Data were collected to
measure intermediate stages of generalization at six points and generalization to conversational
speech was measured at three data points. Relative progress/overall gains in terms of Percent
Consonant Correct (PCC) and Wordshape Match (WSM) were compared to subjects from
Bernhardt (1990,1993a). Results are discussed in terms of nonlinear phonological theory and more
recent developments in the area of constraint theory. Further discussion involves the interaction of
phonetics and phonology, especially where physical limitations are concerned. Finally, the process
of optimization is discussed in terms of effectiveness and research design. Suggestions for future
phonology research based on everyday practise are provided. === Medicine, Faculty of === Audiology and Speech Sciences, School of === Graduate
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