Although difficult to define, stimulability is an easily measured skil
l that can provide valuable information for clinicians treating childr
en with phonological disorders. In this article, we review changing tr
ends in the definition of stimulability, standardized and nonstandardi
zed approaches to its measurement, and clinical implications of stimul
ability for prognosis and treatment plan development as they have evol
ved over a 40-year period. Clinical application of stimulability infor
mation in caseload management and intervention is emphasized.