Psychometrics / Social Support / Emotions / Mexico / Self Efficacy / Students / Humans / Female / Male / Self Concept / Questionnaires / Adult / Public health systems and services research / Chi Square Distribution / MEXICO / Psychological Models / Cross-Over Studies / Students / Humans / Female / Male / Self Concept / Questionnaires / Adult / Public health systems and services research / Chi Square Distribution / MEXICO / Psychological Models / Cross-Over Studies