ZH-DSX1 (new) place preference in rats box place preference is experimental animals (rat, mouse) in the conditioned place preference box gray observation area, and to give psychological dependence medications (such as morphine), and between activity observed in experimental animals conditioned place preference box of gray areas and black and white color area and the gray area, black and white color area and the gray area where free shuttle wickets for animals. Experiment is a classic experimental model for evaluating drug psychological dependence. Applied drug, pharmacology, toxicology, learning and memory / dementia, drug development / screening / evaluation, preventive medicine, disciplines neurobiology, animal psychology, behavioral biology and other scientific research.