And just as human addicts experience intense cravings when they encounter drug paraphernalia or places where they have scored, the animals, too, come to prefer an environment that they associate with the drug—an area in the cage in which lever pressing al
And just as human addicts experience intense cravings when they encounter drug paraphernalia or places where they have scored, the animals, too, come to prefer an environment that they associate with the drug—an area in the cage in which lever pressing al
而且，就像人类成瘾者一碰上与药物有关的器具，或回到他们取得药物的环境时，所会发生的强烈药物欲一样，实验动物也变得比较喜欢与药物有关的场所，也就是笼子里按压杆时总会提供化学报偿的地方。