Boyd E S, Boyd E H, Brown L E
Electroencephalogr Clin Neurophysiol. 1977 Mar;42(3):355-63. doi: 10.1016/0013-4694(77)90171-7.
It was shown that the late negative wave evoked in squirrel monkey cortex by tone cues signalling the availability of reward was smaller when the animal did not respond to the cue and often disappeared if the animal ignored many cues in succession. It decreased in amplitude as a test session progressed, and the rate of this decrease increased if the rate of reinforcement was increased. In some animals the size of the evoked wave was smaller if the animal was not fasted before a test session. In some animals the average size of a significant positive correlation with the number of cues responded to and a negative correlation with the animal's average reaction time. It is concluded that the evoked wave is probably a reflection of the conditioned incentive value of the cue.
结果表明，当松鼠猴不响应提示信号时，由提示奖励可用性的音调线索在其皮层中诱发的晚期负波较小，并且如果动物连续忽略许多线索，该负波通常会消失。随着测试阶段的进行，其振幅会降低，如果强化速率增加，这种降低的速率也会增加。在一些动物中，如果在测试阶段前未禁食，诱发波的大小会较小。在一些动物中，诱发波的平均大小与响应的线索数量呈显著正相关，与动物的平均反应时间呈负相关。结论是，诱发波可能反映了线索的条件性激励价值。
