“…We have chosen the following variables to be predicted in the regression analysis: self-concept clarity, purpose in life and generalized self-efficacy -all linked to optimal functioning (e.g. : Emery, Walsh, & Slotter, 2015;Van Dijk et al, 2014;Ryff & Singer, 1998;Prairie, Scheier, Matthews, Chang, & Hess, 2011;Zhao, Lei, He, Gu, & Li, 2015).…”