Volunteers were given either a 200 milligram (mg) caffeine pill — equivalent to one cup of strong coffee — or a placebo. Caffeine improved convergent thinking but had no real impact on divergent thinking.
Volunteers were given either a 200 milligram (mg) caffeine pill — equivalent to one cup of strong coffee — or a placebo. Caffeine improved convergent thinking but had no real impact on divergent thinking.
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