“…In April 2018, we used the key term "work engagement" to conduct a separate search of the literature on randomized controlled trials (RCTs) using UWES to measure overall work engagement. We found 19 RCTs conducted since 2012 (Hengel et al, 2012;Vuori et al, 2012;Strijk et al, 2013;Ângelo and Chambel, 2013;Coffeng et al, 2014;van Berkel et al, 2014;Imamura et al, 2015Imamura et al, , 2017Bernburg et al, 2016;Buijze et al, 2016;Ebert et al, 2016a,b;Heber et al, 2016;Vallières et al, 2016;van Dongen et al, 2016;Klatt et al, 2017;Michishita et al, 2017;Steinberg et al, 2017;Gollwitzer et al, 2018). However, only six studies showed a significant improvement in work engagement in the intervention group compared to the control group (Imamura et al, 2015(Imamura et al, , 2017Ebert et al, 2016a;Heber et al, 2016;Steinberg et al, 2017;Gollwitzer et al, 2018).…”