I'll defend that variable selection a little bit, as I feel that the measure they use to capture 'despair' is actually binary in reality. I'd categorize a handful of young men around my age as being in this category. What they seem to have in common with each other is a consistent downtrodden-ness that doesn't fluctuate much from day to day; it's pervasive to their entire personality, it's who they are.

I imagine if you studied this is a less discrete, non-binomial method you'd see even sharper trends. I don't know a single person my age who feels the future has anything for them.