Genty Emilie, Chung Paul Chu Sin, Roeder Jean-Jacques
Centre de Primatologie, UDS, Chemin du Fort Foch, 67207 Niederhausbergen, France.
Behav Processes. 2011 Jan;86(1):133-7. doi: 10.1016/j.beproc.2010.10.006. Epub 2010 Oct 31.
A common paradigm used to study inhibitory control is the reverse-reward contingency task in which the subject is presented with a choice between two different quantities of food and is rewarded with the non-chosen item. Most animals have problems inhibiting their impulsive choice towards the larger quantity, and need correction procedures to master the reverse-reward task. Recent studies have nonetheless shown that rhesus macaques and white crowned mangabeys were able to master the task without correction procedures after a large number of trials were applied. We previously demonstrated that, similar to other primates tested under the reverse-reward contingency task, lemurs initially showed an impulsive bias towards the larger quantity of food. But following introduction of a large-or-none contingency, all the subjects learned to reliably select the smaller quantity in order to gain access to the larger one. Here, we assessed the possibility that, similar to rhesus macaques and mangabeys, lemurs could master the reverse-reward task, without a modified procedure, by presenting a large number of trials. One of 5 subjects was able to master the task and then generalize performance to novel food arrays.
一种常用于研究抑制控制的范式是反向奖励应急任务，在该任务中，受试者要在两种不同数量的食物之间做出选择，并因未选择的食物而获得奖励。大多数动物在抑制对较大数量食物的冲动选择方面存在困难，需要矫正程序来掌握反向奖励任务。然而，最近的研究表明，恒河猴和白冠白睑猴在进行大量试验后，无需矫正程序就能掌握该任务。我们之前证明，与在反向奖励应急任务下测试的其他灵长类动物一样，狐猴最初对较大数量的食物表现出冲动偏好。但是在引入“全有或全无”应急机制后，所有受试者都学会了可靠地选择较小数量的食物，以便获得更大数量的食物。在此，我们评估了这样一种可能性，即与恒河猴和白睑猴类似，狐猴能否通过进行大量试验，在不采用修正程序的情况下掌握反向奖励任务。5只受试者中有1只能够掌握该任务，然后将其表现推广到新的食物组合中。
