Minor edits + difficulty understanding some parts

I think it does indicate a lack of generalizability. Since the questionnaire was developed by and completed by the same third-year psych students, we're probably not representative of the any population (unless the population is defined as "third-year psych students UBC" haha!). That's my rationalization at least, what do you think?

And also regarding to another facet of generalizability is different conditions. Having high generalizability is the degree that they apply widely over different persons, situations, cultures, and times. For example, from our questionnaire, the reactions from an individual who encounters unfortunate events may different from the reactions from getting fired in the workplace. Or any other examples that could be added to the “limitation” part?

Exactly my thoughts. While we are a diverse group of students, we are all subject to relatively similar situations/cultures, so generalizability is an issue with our GD. That's a good example. Aggressiveness/sensitivity to a negative comment is also a similar case.