... Testament to its increased popularity is the accumulation of research studies on peer assessment and most notably more than thirty review studies covering a wide variety of topics. Among the topics investigated by these reviews are as follows: (i) the design and implementation of peer assessment practices (Adachi et al., 2018;Gielen et al., 2011;Luxton-Reilly, 2009;Topping, 1998Topping, , 2003Topping, , 2013Topping, , 2017Topping, , 2021aStrijbos et al., 2009;Van den Berg et al., 2006a, b;Van Gennip et al., 2009); (ii) reliability and validity of peer assessment (Falchikov & Goldfinch, 2000;Li et al., 2016;Speyer et al., 2011;Topping, 1998Topping, , 2003Topping, , 2013Topping, , 2017; (iii) quality criteria for peer assessment practices (Ploegh et al., 2010;Tillema et al., 2011); (iv) impact of social and interpersonal processes (Panadero, 2016;Panadero & Alqassab, 2019;Panadero et al., 2018;Strijbos et al., 2009;Topping, 2017;Van Gennip et al., 2009); (v) peer assessment of collaborative learning (Lejk et al., 1996;Dijkstra et al., 2016;Forsell et al., 2020;Meijer et al., 2020;Strijbos, 2016;Strijbos et al., 2017); and (vi) how the instructional conditions relate to peer assessment outcomes (Ashenafi, 2017;Double et al., 2020;Hoogeveen & Van Gelderen, 2013;Huisman et al., 2019;Li et al., 2020;Panadero et al., 2018;Sanchez et al., 2017;Sluijsmans et al., 1999;Topping, 1998Topping, , 2003Topping, , 2013Topping, , 2021aVan Popta et al., 2017;Van Zundert et al., 2010). Topping (1998) initially defined peer assessment as 'an arrangement in which individuals consider the amount, level, value, worth, quality, or success of the products or outcomes of learning of peers of similar status' (p. ...