What if pupils can assess their peers anonymously? What if pupils can assess their peers anonymously? A quasi-experimental study. Ellen Vanderhoven a,b , Annelies Raes a , Hannelore Montrieux a , Tijs Rotsaert a and Tammy Schellens a a Department of Educational Studies, Ghent University b iMinds, MICT, Ghent University annelies.raes@ugent.be , ellen.vanderhoven@ugent.be , hannelore.montrieux@ugent.be , tijs.rotsaert@ugent.be , tammy.schellens@ugent.be Correspondence concerning this manuscript should be addressed to: Ellen Vanderhoven Department of Educational Studies, Ghent University, Henri Dunantlaan 2, 9000 Gent. Tel.: +329 3310316 Fax: +329 3310320 E-mail: Ellen.Vanderhoven@ugent.be Note: Manuscript accepted for publication in Computers & Education