“…Across all articles reviewed, online questionnaires were the most commonly applied method of data collection. Online questionnaires were used (a) as a single datacollection method in eight studies (Adarmouch et al, 2020;Aubry et al, 2021;Camerlink et al, 2021;Guintivano et al, 2021;Kappel et al, 2021;Myers et al, 2020;Ramvilas et al, 2021;Stamp et al, 2021) and (b) in conjunction with other data sources in two studies that included email exchanges, mentor's notes, and papers co-authored by the mentor and doctoral researchers, as well as their perceptions of the effectiveness of the mentoring programme or website analytics and post-conference surveys (Raby and Madden, 2021). One of the papers involved data collection in the form of documents posted to an openaccess preprint repository for social sciences (Cui et al, 2022).…”