Abstract
Speech and language therapists are under ever-increasing pressure to demonstrate the value of their work, both in terms of cost to the pur chaser and benefit to the client. The work of these therapists in school settings differs significantly from their work in health-care settings, not least because of strong philosophical and organizational differences between health and education. This paper argues that the methods developed within the field of educational research are amongst the most productive in the investigation of effectiveness. It provides details of a multidimensional model which could be applied in educational settings.
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