Order of discriminations performed.

An example of the cue combinations used in the attentional set shifting task (ASST) of rats that were shifted from the digging medium to odour as the relevant dimension. Rats performed a series of 7 discriminations: simple discrimination (SD), compound discrimination (CD), reversal 1 (Rev1), intradimensional shift (ID), reversal 2 (Rev 2), extradimensional shift (ED), reversal 3 (Rev 3). The correct exemplar (shown in bold) was paired with either of two exemplars from the irrelevant dimension (i.e., at the CD phase, the clay pellets were paired with either rum or cream odour, etc). In the ID and ED, there were novel pairs of exemplars of each dimension.