It's the contrast between stress and no stress. The question becomes, well,how much stress do you need to have before you lower the stress?,".

VOA: standard.2009.04.17

"What we've proven to be useful and what does work is having a person in a stressed state, and then reducing that stress because it's that contrast is what motivates a person to cooperate, what motivates a person to start talking.

VOA: standard.2009.04.17

Mr Obama, by contrast, puts greater stress on Iran taking the final, essentially political, step to acquiring a device by bringing together all its technological components.

ECONOMIST: Iran��s nuclear programme

Conservatives like to contrast what they see as a Confucian stress on social harmony and moral rectitude with the West's emphasis on individual rights.

ECONOMIST: China