“…Four of these studies investigated more than one vocalization, all thirteen studies scored average on the GRADE scale, and all thirteen studies found an association between vocalization and pain (Abbey & Abbey, 2009;Cohen-Mansfield & Creedon, 2002;Decker, 2009;Gélinas et al, 2018;Igier, Sorum, & Mullet, 2014;Kovach, Griffie, Muchka, Noonan, & Weissman, 2000;Pereira, Morete, Bueno, & Santo, 2011;Rose et al, 2011;Solodiuk, 2013;Swiggum, Hamilton, Gleeson, Roddey, & Mitchell, 2010;Symons, Byiers, Tervo, & Beisang, 2013;van Iersel, Timmerman, & Mullie, 2006;Zwakhalen, van Dongen, Hamers, & Abu-Saad, 2004).…”