Table 1.

Example of Order of Exemplar Exposure in the Attentional Set-Shifting Task.

Discrimination	Odor Pair	Medium Pair
Simple discrimination	cumin/cinnamon	bedding
Compound discrimination	cumin/cinnamon	cedar shavings/boxo
Reversal 1	cumin/cinnamon	cedar shavings/boxo
Intra-dimensional shift	thyme/cloves	fine shavings/paperchips
Reversal 2	thyme/cloves	fine shavings/paperchips
Extra-dimensional shift	oregano/paprika	Cat litter/ground cat litter
Reversal 3	oregano/paprika	Cat litter/ground cat litter

The table shows a possible order of exposure to the exemplar, where the rat must shift its attention from odor to digging medium at the extra-dimensional shift acquisition. The rewarded exemplar is indicated by the underlined words. Presented with either of the two exemplars from the irrelevant dimension, so that during each trial within a discrimination, all four exemplars are present. Rats were counterbalanced so that 50% underwent odor to medium shift.