Table 2. Attentional Set-Shifting Test Protocola.
| Discrimination stage | Dimensions | Example combinations | ||
|---|---|---|---|---|
| |
Relevant |
Irrelevant |
(+) |
(−) |
| Simple (SD) | Odor | Clove/Sawdust | Nutmeg/Sawdust | |
| Compound (CD) | Odor | Medium | Clove/Raffia Clove/Metallic Filler | Nutmeg/Metallic Filler Nutmeg/Raffia |
| Reversal 1 (R1) | Odor | Medium | Nutmeg/Raffia Nutmeg/Metallic Filler | Clove/Metallic Filler Clove/Raffia |
| Intra-dimensional shift (ID) | Odor | Medium | Rosemary/Wood balls Rosemary/Plastic beads | Cinnamon/Plastic beads Cinnamon/Wood balls |
| Reversal 2 (R2) | Odor | Medium | Cinnamon/Plastic beads Cinnamon/Wood balls | Rosemary/Wood balls Rosemary/Plastic beads |
| Extra-dimensional set-shift (ED) | Medium | Odor | Velvet/Citronella Velvet/Thyme | Crepe/Thyme Crepe/Citronella |
a
Representative examples of stimulus pairs, and the progression through the stages of the attentional set-shifting test, with odor as the initial discriminative dimension, shifting to digging medium in the ED stage. Half the rats began with medium as the initial stimulus and shifted to odor. For each task, the positive stimulus is in bold, and is paired randomly across trials with the two stimuli from the irrelevant dimension.