Overmatching in rats: The barrier choice paradigm
Overmatching in rats: The barrier choice paradigm
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DOI：
10.1901/jeab.2001.75-93
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发表时间：
2001-01-01
影响因子：
2.7
通讯作者：
Aparicio, CF
中科院分区：
文献类型：
--
作者：
Aparicio, CF
障碍选择范式用于对大鼠在两个杠杆之间移动的行为施加成本：在并发的随机间隔计划中，用食物强化按下两个杠杆，但老鼠必须爬过障碍物才能从一个杠杆移动到另一个杠杆。在涉及多对随机间隔计划的两个阶段中，分隔杠杆的障碍高度从 30.5 厘米增加到 45.7 厘米。对于 30.5 厘米障碍，广义匹配定律显示响应和时间分配的斜率等于或略高于 1.0。对于 45.7 厘米的障碍物，广义匹配定律显示响应的斜率高于 1.2，这表明对强化的敏感性随着障碍物高度的增加而增加。对于时间分配，斜率保持接近 1.0；对强化的敏感性似乎并没有随着屏障高度的增加而增加。讨论了运动努力在选择情况下的作用。
The barrier choice paradigm was used to impose a cost on rats' behavior of traveling between two levers: Pressing on two levers was reinforced with food on concurrent random-interval schedules, but rats had to climb over a barrier to move from one lever to another The height of the barrier separating the levers was increased from 30.5 to 45.7 cm across two phases that involved various pairs of random-interval schedules. With the 30.5-cm barrier, the generalized matching law showed slopes equal to or slightly above 1.0 for response and time allocation. With the 45.7-cm barrier, the generalized matching law showed slopes above 1.2 for responses, indicating that sensitivity to reinforcement increased with increasing barrier height. For time allocation the slopes remained close to 1.0; sensitivity to reinforcement did not seem to increase with increasing barrier height. The role of locomotion effort in choice situations is discussed.