Response-independent milk delivery enhances persistence of pellet-reinforced lever pressing by rats
Response-independent milk delivery enhances persistence of pellet-reinforced lever pressing by rats
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DOI：
10.1901/jeab.2001.76-179
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发表时间：
2001-09-01
影响因子：
2.7
通讯作者：
Shull, RL
中科院分区：
文献类型：
--
作者：
Grimes, JA;Shull, RL
如果在训练过程中，一种刺激与更高的强化速率相关，那么在存在更高速率的信号时，反应将更耐消退，即使许多增强剂是独立于反应而呈现的。在本研究中，我们询问反应非依赖型增强剂是否必须与反应依赖型增强剂相同以增强反应的持续性。12只长埃文斯帽大鼠在两种辨别性刺激(眨眼)存在的情况下，通过杠杆挤压(可变间隔100-S计划)获得45 mg食物颗粒。稳定的灯光)，在日常会话中每分钟交替。此外，在其中一种刺激(在大鼠之间平衡)存在的情况下，大鼠接受额外的不依赖于反应的甜炼乳(可变时间安排)。灭绝会议与训练会议完全相同，只是既不呈现颗粒也不呈现牛奶。当(A)训练期间的产奶量(在可变时间30 S计划下)为0.04毫升(对0.01毫升)，以及(B)120-S或240-S停电分离成分时，杠杆按压更能抵抗与牛奶相关的刺激-IS的影响。不依赖于反应的增强剂不必与依赖于反应的增强剂相同才能增强持久性。
If, during training, one stimulus is correlated with a higher rate of reinforcement than another, responding will be more resistant to extinction in the presence of that higher rate signal, even if many of the reinforcers have been presented independently of responding. For the present study we asked if the response-independent reinforcers must be the same as the response-dependent reinforcers to enhance the response's persistence, Twelve Long-Evans hooded rats obtained 45-mg food pellets by lever pressing (variable-interval 100-s schedules) in the presence of two discriminative stimuli (blinking ys. steady lights) that alternated every minute during daily sessions. Also, in the presence of one of the stimuli (counterbalanced across rats), the rats received additional response-independent deliveries of sweetened condensed milk (a variable-time schedule). Extinction sessions were exactly like training sessions except that neither pellets nor milk were presented. Lever pressing was more resistant to extinction in the presence of the milk-correlated stimuli-is when (a) the size of the milk deliveries during training (under a variable-time 30 s schedule) was 0.04 ml (vs. 0.01 ml) and (b) 120-s or 240-s blackouts separated components. Response-independent reinforcers do not have to be the same as the response-dependent reinforcers to enhance persistence.