I ran 'Half Full' as a stand-alone module to encourage people to think about the relative draw-backs and benefits of different perspectives on the world.
As directed, the delegates completed the questionnaire on their own and then read the handout. They then started to answer the questions on their own too. One delegate found this very difficult so we stopped writing and opened the whole thing up as a discussion.
Very quickly all delegates were involved in talking through the merits of pessimism and optimism. We identified some key learning points - not to bring up barriers when others don't act as you'd want, that optimists should think about analysing risk and pessimists can look to improve their outlook. We also had a very intense and productive debate about the value of constructive feedback and how one goes about it.
All in all, the exercise 'did what it said on the can' and I've been delighted with it.