论葛洪的"君道"思想

葛洪《抱扑子外篇》卷五之《君道》,以儒家思想为主线,论述了"君臣"治国执政之道。葛洪的"君道"治政思想具有独特见解和系统观点,其基本思想和观点是儒道治政思想和理念的概括和总结,也是中国传统文化思想和内容的有机组成部分,具有重要的理论价值和现实意义。     

Instrumental responding following reinforcer devaluation

In two experiments, hungry rats were given instrumental lever-press training for an appetitive reinforcer and, in addition, were exposed to another type of food which was not contingent on lever pressing. In the first experiment, exposure to each type of food was on separate days, whereas in the second experiment rats were exposed to each type of food in strict alternation within each session. Subsequently, a food aversion was conditioned to the reinforcer for the experimental group and to the non-contingent food for the control group. In both experiments, animals with an aversion to the reinforcer responded less in an extinction test than animals with an aversion to the non-contingent food. Subsequent reacquisition tests confirmed that the aversion to the non-contingent food in the control group was of comparable strength with that to the reinforcer in the experimental group. The results were discussed in terms of whether the reinforcer is encoded in the associative structure set up by exposure to an instrumental contingency.