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"We think there has been learning reversal in some cases.
The tests measured "inhibitory control, associative learning, reversal learning, and spatial memory".
Here we tested the ability of sheep to perform tests of executive function (discrimination learning, reversal learning and attentional set-shifting).
Three phases of the test were performed: acquisition (initial learning), reversal (platform in the opposite quadrant from acquisition), and shift, (platform in a quadrant adjacent to where it was during reversal) and with platform size reduced for each phase after acquisition in order to make the task progressively more difficult.
The SHR may be impaired in discrimination learning, reversal learning and attentional set-shifting.
PGs and ADs did not differ from HCs in discrimination learning, reversal learning, or extinction learning, on the nonparametric tests.
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However, the other reversal learning variables, ID reversal and ED reversal, had somewhat inconsistent factor loadings.
A more recent study in marmoset monkeys has demonstrated that fibre-sparing, excitotoxic lesions of the medial striatum impair reversal learning in a visual serial reversal task [10].
Monkeys trained on a series of reversals of a single discrimination will learn the reversal of any new discrimination with equal facility.
What processes allow them eventually to learn the reversal of a discrimination faster than they originally learned the discrimination itself, and often with only a single error?
These behaviors disappeared as the sheep learned the reversal (Figure 3B).
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