Background: The Brief Accessibility, Responsiveness and Engagement (BARE) Scale, is a short self-report questionnaire that measures the key behaviors of attachment system. It can be easily administered by both clinicians and researchers of different domains as the dyadic relationship of attachment and mental/physical health has proved by a vast majority of studies. To our knowledge, there is no measure that specifically focuses on couple attachment. Furthermore, we could not find any systematic review and/or meta-analysis which have been conducted to evaluate the psychometric properties of BARE. Methods/design: Two independent reviewers will search comprehensively through relevant databases and also grey literature. Information will be analyzed by means of priori defined criteria by Two of reviewers. Seemingly, data will be extracted from the full texts of included studies based on a set of data extraction form in accordance with the related psychometric information. The methodological quality of studies on the development and validation of BARE will be assessed using consensus-based Standards for the selection of health Measurement Instruments (COSMIN) checklist. Finally, the psychometrics of this tool, will then be analyzed using predefined criteria. Result. Systematic review with meta-analyses involving multidimensional outcomes. Discussion: In this protocol, we have briefly described our method for conducting a systematic review in order to measuring the psychometric properties of BARE. All of reasons call for exploring psychometric properties of BARE discussed comprehensively in introduction. It is a first and crucial step to formulate the recommendations every researcher either a clinician needs in work with couples. Systematic review registration: PROSPERO CRD42020210098
