This is the supplementary data for manuscript accepted for publication in Journal of Documentation. The data includes necessary calculations required to understand the details of reported findings in the article. This article investigates the professional identities of library, archive, and museum (LAM) professionals across five European countries: Denmark, Germany, Hungary, Norway, and Sweden. Using online questionnaires, we examined how these professionals perceive their relationships with others in their field, considering various demographic factors. Our findings reveal both distinctions and overlaps in roles among LAM professions, hinting at potential avenues for collaboration. These insights add value by illuminating the dynamics between different professional domains within the LAM sphere.

SPSS, 28