March 29/Vancouver/University of British Columbia -- Workers who thrive on difficult tasks lose their motivation when given stimulants such as caffeine and amphetamine, according to a study by University of British Columbia researchers.
Researchers divided rats into two groups based on their preference for high-difficulty/high-reward tasks or low-difficulty/low-reward tasks to determine whether certain drugs would affect them differently based on that personality trait, according to psychologist Jay Hosking, who executed the study with co-author Catharine Winstanley.