It acts out of instinct and is primarily a stimulus-response machine with survival as its focus.

FORBES: Hijack! How Your Brain Blocks Performance

We have moved from viewing animals as instinct-driven stimulus-response machines to seeing them as sophisticated decision makers.

WSJ: The Brains of the Animal Kingdom

Meanwhile Kaoru Yosano, the new economy minister with a clear sense of what needs to be done to overhaul the country's finances in the face of an ageing population, was ordered to cobble together a fiscal-stimulus package in response to panicky (and probably unfounded) fears that the economy was tipping into a deep recession again.

ECONOMIST: Japan

He has suggested that fiscal stimulus - encouraging spending to boost the economy - is a sensible response to recession if the country can afford it.

BBC: A heavyweight tempted back by a crisis