Expectations are an integral part of the psychosocial makeup of each patient, and there is a growing recognition among physiotherapists that psychosocial issues may impact the outcome of physiotherapy. This article seeks to clarify the term "patient expectation" by providing some definitions and an overview of the literature describing the concepts and theories associated with patients' expectations. These concepts are then related to physiotherapy to highlight the impact that patients' expectations may have on the outcome of physiotherapy, and the implications for physiotherapy are discussed.