Table 2.
Example of a Possible Combination of Stimulus Pairs for a Rat Shifting from Digging Medium to Odor as the Relevant Dimension
| Discrimination
|
Dimension
|
Exemplar combinations
|
||
|---|---|---|---|---|
| Relevant
|
Irrelevant
|
S+
|
S−
|
|
| SD | Medium | M1 | M2 | |
| CD | Medium | Odor | M1/O1 | M2/O2 |
| M1/O2 | M2/O1 | |||
| IDS | Medium | Odor | M3/O3 | M4/O4 |
| M3/O4 | M4/O3 | |||
| Reversal | Medium | Odor | M4/O3 | M3/O4 |
| M4/O4 | M3/O3 | |||
| EDS | Odor | Medium | O5/M5 | O6/M6 |
| O5/M6 | O6/M5 | |||
Half of the rats switched from medium to odor and half switched from odor to medium. The correct examplar is shown in bold and can be paired with either exemplar from the irrelevant dimension. In the IDS and EDS, the stimuli were novel exemplars of each dimension.