Say you have been playing rubber bridge (it just about still exists), and haven't picked up any points all afternoon and are losing heavily....

You pick up a hand which you judge totally borderline, in terms of the percentages and risk reward of whether to settle for a part score or bid a game.

Are you more likely than usual to:

(Answers appreciated but please note this is research into psychology (for a book i am writing about games and life), not about the theoretical points about what your bank roll is, how long the session is, what the strengths of your opponents or what % you need to be to bid game at different vulnerabilities etc.)

Getting results...