This paper is based on an empirical study of attempts to achieve change in
clinical behaviour across a United Kingdom National Health Service (NHS) He
alth Authority (HA). We suggest that the evidence based medicine (EBM) move
ment underpinning such attempts is premised upon a highly rationalistic con
ception of change. Here the generation and implementation of research findi
ngs into clinical practice is understood as movement between discrete entit
ies. Drawing upon poststructural philosophy, social studies of science and
technology, social anthropology, and gender studies, we challenge such line
ar perspectives through a more immanent alternative. We conceive of change
as movement within indeterminate or ambiguous relationships. We then procee
d to discuss the implications of this modality for the management of clinic
al behaviour change. (C) 1998 Elsevier Science Ltd. Bill rights reserved.