 Outcome measures will include: EBP belief and EBP implementation scales Melnyk Fineout-Overholt, 2003; EBP knowledge cognitive test; of lit searches conducted by unit RN staff ; of requests for library support for lit searches or to obtain search-related articles: of unit clinical policies with documented levels of evidence research references. EBP belief, EBP implementation and EBP knowledge variables will be analyzed at both individual and unit levels of analysis. All other variables will be measured at the unit level of analysis. Additional unit level variables will include the following data collected annually as part of the National Database for Nursing Quality Indicator NDNQI RN satisfaction survey: satisfaction with RN-RN interaction, satisfaction with autonomy, satisfaction with practice decision-making, perceived quality of care delivered on the unit. 