“…SAD has an early onset ( Fehm, Beesdo, Jacobi, & Fiedler, 2008 ), a relatively high prevalence in adolescents (with estimated rates between 5.0% and 9.1%; Costello et al, 2011 , Merikangas et al, 2010 ), and a negative prognosis in the absence of treatment ( Bornas, de la Torre-Luque, Fiol-Veny, & Balle, 2017 ). These findings suggest that having time and cost-effective, valid, and reliable screening tools available to accurately detect this disorder and monitor treatment progress is crucial ( Buela-Casal, & Guillén-Riquelme, 2017 ).…”