1. Why Sleep is Key: Poor Sleep Quality is a Mechanism for the Bidirectional Relationship between Major Depressive Disorder and Generalized Anxiety Disorder Across 18 Years Open Access Author: Nguyen, Vivian Title: Why Sleep is Key: Poor Sleep Quality is a Mechanism for the Bidirectional Relationship between Major Depressive Disorder and Generalized Anxiety Disorder Across 18 Years Area of Honors: Psychology Keywords: sleep qualitydepressionanxietylongitudinalmechanismcomorbidity File: Download Thesis_20210405.pdf Thesis Supervisors: Michelle Gayle Newman, Thesis SupervisorFrank Gerard Hillary, Thesis Honors Advisor