Direct link established between stimulus-response learning, material abuse

http://feeds.sciencedaily.com/~r/sciencedaily/mind_brain/addiction/~3/s1_0AfQR4aM/131031125321.htm
Direct link established between stimulus-response learning, material abuse
A neuroscientist has found that the area of the brain involved in stimulus-response learning is directly connected to the consumption of liquor, tobacco and drugs. More specifically, she discovered that people who resorted to stimulus-response learning smoked more, had double the consumption of liquor and were more likely to use cannabis.