The present study evaluated the effects of exposure to facial expression of pain, on observers' perceptions of pain expression. Thirty-one male and 49 female observers judged 1-s video excerpts in a signal detection paradigm. The excerpts showed facial expressions of shoulder-pain patients displaying no pain or moderate pain. Participants were randomly allocated to one of four groups, which varied in the number of prior exposures of a 1 s display of strong pain. On each test trial, participants indicated whether the test stimulus showed no pain or pain. Data were analyzed using signal detection theory methods. There was a linear relationship between the density of exposure to strong pain and observers' response criteria: greater exposure was associated with more conservative decisions. On average, participants showed very high levels of sensitivity to pain expression, with women significantly outperforming men. Results are discussed in terms of their implications for pain judgments of health care professionals, adaptation-level theory, and the psychophysical method of selective adaptation.

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The Comox Valley Nursing Centre was initiated as a two year demonstration project by the Registered Nurses Association of British Columbia (RNABC) and funded by the Ministry of Health. The purpose of the project was to demonstrate innovative nursing practice in a primary health care context. Findings from the project were expected to inform provincial health care planning, nursing scope of practice, and health and nursing policy development. A free standing nursing center was planned and implemented through a collaborative effort by RNABC, nurses and community residents. An external team of researchers evaluated the project using a variety of methods, including participatory action research. During the project an innovative nursing practice, based on principles of collaboration, developed and has continued during the extended provincial and regional funding of the Centre. Drawing from the evaluation findings, case studies and using Henneman, Lee and Cohen's (1995) concept analysis of collaboration, this paper describes how the principles of collaboration were actualized or suppressed. The paper examines how collaboration impacted empowerment for nurses, clients and the community. Lessons learned about the reciprocal relationships between collaboration and empowerment, implications for nursing practice, and how the approach can contribute to a better understanding of the impact of collaborative practice approaches on health care delivery are discussed.

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