A review of: Urquhart, C., and R. Davies. ”EVINCE: The Value of Information in Developing Nursing Knowledge and Competence.” Health Libraries Review 14.2 (1997): 61-72. Objective – To examine the impact of information on the clinical knowledge and practice of nurses, midwives and health visitors. Design – Two surveys: a one-page critical incident questionnaire survey sent weekly over four weeks, and a questionnaire attached to information requests and searches, followed up by interviews. Setting – UK health information providers serving nurses (national information providers, National Health Service trust libraries, higher education funded library and information services, and a health promotion library). Subjects – A random sample of 210 nurses, midwives and health visitors were targeted in the critical incident survey, and 776 of those requesting information or searches at participating library and information centres received questionnaires for the second survey. Methods – Opinion leaders were consulted to inform a pilot study. A critical incident type questionnaire survey was then administered to a random sample of 210 nurses, midwives and health visitors. The same one-page questionnaire was sent weekly (for four weeks) to 10% of a randomly selected sample of staff at each site. Staff were asked to identify one occasion during that week when they needed information, the purpose of the information needed, the sources chosen to answer the query and how successful the quest was. The impact of the information provided by the library and information services on present and future professional practice was examined through a complementary survey. Responses were coded using three categories of competence: assessment, monitoring of care and evaluation of care. Follow-up interviews then explored the nature of the incident described or the quality of information provided. Main results – The response rate for the critical incident survey was 52% (434 out of 840 completed questionnaires returned) with 78% (163/210) of participants replying at least once. The total response rate for the second survey was 40% (311/776). Ninety percent of respondents stated that the information they obtained from the library or information service added to their knowledge, and 86% had been able to use some information immediately. Sixty-one percent reported that information had refreshed their memory, and 75% agreed that information substantiated what they had known or suspected. Seventy-six percent of respondents agreed that they needed to obtain more information on the topic, while 23% had expected to find something else. Eighty-eight percent of respondents indicated that they would share the information with colleagues. Ninety-six percent of respondents agreed that the information obtained would contribute to future practice. Seventy percent felt that the information would or did help in evaluation of practice outcomes, 68% for improved quality of life for patient and/or family and 61% in interpersonal relations with clients/patients. Other majority responses were for Audit or standards of care (57%), Monitoring of care (56%) and Legal or ethical issues (51%). Base or ward sources were used in 72% of patient care related incidents and colleagues in 56% of these incidents. Of 148 incidents involving use of a library, the primary purposes were personal updating (62%), coursework (54%), patient care – specific drug or therapy (44%), and teaching staff, students or colleagues (39%). Conclusion – The findings demonstrate the value of information to nursing professionals while acknowledging that the library is not necessarily a principal source of such information. Ward-based resources and information from colleagues continue to play a dominant part in information use. Rather than reducing uncertainty, the value of information may lie in encouraging uncertainty and reflective practice. Information professionals must seek a greater understanding of situations and methods of presentation by which they might encourage reflective practice.