A predictive model of perceived stress during the first wave of the COVID-19 pandemic in university students Ecuadorians - Reivan Ortiz, Geovanny Genaro (Catholic University of Cuenca (Equador). Laboratory of Basic Psychology, Behavioral Analysis and Programmatic Development (PAD-LAB)) ; Yanza, Rafael (Catholic University of Cuenca (Equador). Laboratory of Basic Psychology, Behavioral Analysis and Programmatic Development (PAD-LAB)) ; Campoverde, Ximena (Catholic University of Cuenca (Equador). Laboratory of Basic Psychology, Behavioral Analysis and Programmatic Development (PAD-LAB)) ; Estrada Cherres, Johanna Paulina (Catholic University of Cuenca (Equador). Laboratory of Basic Psychology, Behavioral Analysis and Programmatic Development (PAD-LAB)) ; Reinoso García, Lourdes Priscila (Catholic University of Cuenca) ; Diaz, José (Catholic University of Cuenca) ; Granero, Roser (Universitat Autònoma de Barcelona)