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Treatment groups and sample sizes.
| treatment group | pre-shift phase sucrose concentration | post-shift phase sucrose concentration | handling method | sample size |
|---|---|---|---|---|
| successive negative contrast (SNC) | 32% | 4% | tail tunnel |
8 8 |
| unshifted (SNC) control | 4% | 4% | tail tunnel |
8 8 |
| successive positive contrast (SPC) | 4% | 32% | tail tunnel |
8 8 |
| unshifted (SPC) control | 32% | 32% | tail tunnel |
8 8 |
