“Professors invest time in students, committees, and teaching; students invest time in their assignments. Pushed to the side are research projects, dissertations, authorial goals, and, often, social lives.
That changes in the summer. The fixed schedule disappears, the community disperses, and the work that has been building up over the school year can loom dangerously close to deadline…It’s in that solitude that professors and students say they experience what some call a ‘summer slump,’ a period of isolation that can heighten symptoms of depression or anxiety for those susceptible to such disorders.”
Source: More Than a ‘Summer Slump’: How the Loss of Structure Affects Academics – The Chronicle of Higher Education