LAUSR

Librarians and information specialists are experts in designing comprehensive literature searches, such as those needed for Evidence Syntheses (ES). The contributions of these professionals to ES research teams have several documented benefits, especially when they collaborate on the project. However, librarian co‐authorship is relatively rare. This study explores researcher motivations for working with librarians at the co‐author level through a mixed methods design. Interviews with researchers identified 20 potential motivations that were then tested through an online questionnaire sent to authors of recently published ES. Consistent with previous findings, most respondents did not have a librarian co‐author on their ES, though 16% acknowledged one in their manuscript and 10% consulted one but did not document the contribution. Search expertise was the most common motivation both to and not to co‐author with librarians. Those that had or were interested in co‐authoring stated that they wanted the librarians' search expertise, while those who had not or were not interested stated that they already had the necessary search expertise. Researchers who were motivated by methodological expertise and availability were more likely to have co‐authored their ES with a librarian. No motivations were negatively associated with librarian co‐authorship. These findings provide an overview of the motivations that influence researchers to bring a librarian into an ES investigatory team. More research is needed to substantiate the validity of these motivations.