Psychology of all-in

[hezster]

This may be more suited to the psychology forum, but has anyone considered the psychology of putting someone all-in? For instance, let's assume you have the nuts or near-nuts on the river and you want to get all of their stack, but you are not sure they will call off all their chips. They have $100 remaining and the pot is, say $125. Do you think there is a much larger probability that they will call a $80 bet, knowing if they lose they will still, at least, have $20 left, than they will call off the entire $100. I think there may be some psychological hangup with losing your entire stack such that there may be some merit to this idea.