“…Gielen et al (2010) produced a table summarising the criteria used to define and evaluate 'good' peer-feedback in different studies (Kim 2005;Sluijsmans, Brand-Gruwel, and van Merriënboer 2002;Prins, Sluijsmans, and Kirschner 2006;Gielen et al 2010). In addition, we included a few studies that considered variables appropriate to our research (van den Berg, Admiraal, and Pilot 2006; Hämäläinen and De Wever 2013). On this basis, we elaborated the analysis grid used to evaluate the quality of each peer-feedback the students provided (Table 1).…”