“…Not every study used a previously developed and validated measure, though 11 did (Anjum and Muazzam, 2018; Anjum and Muazzam, 2019; Anjum et al , 2019; Badenhorst and Botha, 2022; Björklund et al , 2021; Coyne et al , 2017; Erkutlu and Chafra, 2014; Giorgi, 2012; Glambek et al , 2020; Goodboy et al , 2022; Malik and Björkqvist, 2019). The most frequently used measure was the Negative Acts Questionnaire – Revised (Badenhorst and Botha, 2022; Coyne et al , 2017; Erkutlu and Chafra, 2014; Giorgi, 2012; Glambek et al , 2020; Goodboy et al , 2022). Quantitative studies had sample sizes ranging from 141 to 2,384, whereas the sample sizes of qualitative studies ranged from 7 to 20 (see Table 2).…”