Depression afflicts almost half of STEM graduate students at UC Berkeley (2015)
sciencemag.org
sciencemag.org
You have to graduate in 8 semesters. Period.
No complaints.
1. I was bothered by things that usually don't bother me.
2. I had trouble keeping my mind on what I was doing.
3. I felt depressed.
4. I felt that everything I did was an effort.
5. I felt hopeful about the future. (REVERSED)
6. I felt fearful.
7. My sleep was restless.
8. I was happy. (REVERSED)
9. I felt lonely.
10. I could not "get going."
So yes, it seems like responses to 2, 4, 5, and 10 could have something to do with the nature of the work in addition to students' mental state. But it is also possible that feeling that way about one's work takes a toll on one's mental health. I don't think it's appropriate to conclude anything based on this survey, but it certainly seems to call for further investigation.