institutions, particularly as demands for efficient information services continue to rise despite varying levels of training and mentorship. This study examined training and mentorship as determinants of professional effectiveness among librarians in public universities in Ogun State, Nigeria. The purpose was to determine the extent to which these factors influence librarians' performance outcomes. The study adopted a quantitative explanatory design using the Training and Mentorship for Professi
Oyesola Oyesola (Fri,) studied this question.