Wanting and liking for pleasant rewards usually go together. But the brain separates wanting and liking mechanisms, creating potential for the two to diverge. Addictive desires can arise even without expectation of pleasure or actual pleasure when reward is received. I’ll show a laboratory example as 'wanting for what hurts’, which can also create narrowly focused addictions. Counterintuitively, reward ‘wanting’ may also overlap in mechanisms with forms of fear. These conclusions have been applied to several clinical conditions, ranging from addictions, to anhedonia, to paranoia.
Kent Berridge is the James Olds Distinguished Professor of Psychology and Neuroscience, University of Michigan
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