COCAINE AND FOOD AS REINFORCERS - EFFECTS OF REINFORCER MAGNITUDE AND RESPONSE REQUIREMENT UNDER 2ND-ORDER FIXED-RATIO AND PROGRESSIVE-RATIO SCHEDULES
COCAINE AND FOOD AS REINFORCERS - EFFECTS OF REINFORCER MAGNITUDE AND RESPONSE REQUIREMENT UNDER 2ND-ORDER FIXED-RATIO AND PROGRESSIVE-RATIO SCHEDULES
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DOI：
10.1901/jeab.1991.56-261
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发表时间：
1991-09-01
影响因子：
2.7
通讯作者：
KATZ, JL
中科院分区：
文献类型：
--
作者：
SPEAR, DJ;KATZ, JL
增强剂的大小和固定比例的要求下，两个二阶时间表。 在一个，第一个序列的一个固定数量的反应完成后，经过10分钟的固定间隔产生强化。 在第二个，二阶累进比时间表，固定数量的反应增加后，每次强化。 给予可卡因（0至300 μ g/kg/注射）或食物（0至5，700 mg/递送）麻醉剂。 在某些条件下，在完成每个比率序列时发生刺激光的2秒照明。 在二阶时间表下，随着可卡因剂量或食物量的增加，响应率增加;在最高值时，响应率下降。 将比率要求从10个答复增加到170个答复，总体答复率略有下降。 根据二阶累进比率时间表，可卡因剂量或食物量的增加增加了应答率;在最高食物量下，应答率下降，但可卡因最高剂量下的应答率仍然相对较高。 完成的最高比率要求（临界点）取决于可卡因的剂量，但较少依赖于食物的量。 去除刺激介绍了更大的影响，完成比例要求与可卡因相比，食物。
Reinforcer magnitude and fixed-ratio requirement were varied under two second-order schedules. Under one, the first sequence of a fixed number of responses completed after the lapse of a 10-min fixed interval produced reinforcement. Under the second, a second-order progressive-ratio schedule, the fixed number of responses increased after each reinforcement. Either cocaine (0 to 300-mu-g/kg/inj) or food (0 to 5,700 mg/delivery) reinforcers were delivered. Under some conditions, a 2-s illumination of stimulus lights occurred on completion of each ratio sequence. Under the second-order schedule, as cocaine dose or amount of food increased, rates of responding increased; at the highest values, rates of responding decreased. Increases in the ratio requirement from 10 to 170 responses minimally decreased overall response rates. Under the second-order progressive-ratio schedule, increases in dose of cocaine or amount of food increased rates of responding; at the highest amounts of food, rates of responding decreased but response rates at the highest dose of cocaine remained relatively high. The highest ratio requirement that was completed (breaking point) depended on the dose of cocaine but was less dependent on the amount of food. Removing brief-stimulus presentations had a greater effect on completion of ratio requirements with cocaine compared to food.