عنوان انگلیسی مقاله:
The Midsession Reversal Task with Pigeons Does a Brief Delay Between Choice and Reinforcement Facilitate Reversal Learning?
ترجمه فارسی عنوان مقاله:
وظایف معکوس جلسه میانی با کبوترها آیا تأخیر کوتاه بین انتخاب و تقویت یادگیری معکوس را تسهیل می کند؟
Sciencedirect - Elsevier - Behavioural Processes, 177 (2020) 104150: doi:10:1016/j:beproc:2020:104150
Megan A. Halloran, Thomas R. Zentall*
In a midsession reversal task, the session begins with a simple simultaneous discrimination in which one stimulus
(S1) is correct and the other stimulus (S2) is incorrect (S1+/S2-). At the midpoint of the session, the discrimination
reverses and S2 becomes the correct choice (S2+/S1-). When choosing optimally, a pigeon should
choose S1 until the first trial in which its choice is not reinforced and then it should shift to S2 (win-stay/loseshift).
With this task, pigeons have been shown to respond suboptimally by anticipating the reversal (making
anticipatory errors) and continuing to choose S1 after the reversal (making perseverative errors). This suboptimal
behavior may result from a pigeon’s relative impulsivity due to the immediacy of reinforcement following
choice. In other choice tasks, there is evidence that the introduction of a short delay between choice and
reinforcement may decrease pigeons’ impulsivity. In the present experiment, a delay was introduced between
stimulus selection and reinforcement to assess whether it results in a decrease in anticipatory and perseverative
errors. Pigeons that had a delay between choice and reinforcement were a bit slower in acquiring the midsession
reversal task compared to those without a delay, but showed no decrease in either anticipatory or perseverative
errors. It is likely that the pigeons’ natural tendency to use time from the start of the session to the reversal as a
cue to reverse prevented the delay from increasing accuracy on this task.
Keywords: midsession reversal | delay | of reinforcement | attention | pigeons