| Autor: |
Burns, R., Dupree, E., Lorig, T. |
| Zdroj: |
Bulletin of the Psychonomic Society; November 1978, Vol. 12 Issue: 5 p351-354, 4p |
| Abstrakt: |
Successive reductions in sucrose rewards are examined in two analogous runway experiments. In Experiment 1, rats were trained for 24 preshift days with 1 ml of either 30% or 3% sucrose solution as reward. Training trials were administered two per day with an intertrial interval (ITI) of 3-5 min. During 2 postshift days, all animals received 20 trials (10 per day with the same ITI) with the 3% reward. Experiment 2 employed essentially the same procedure, except the rewards were either eight or two Noyes sucrose (92.4%) pellets in preshift. Postshift was to the two-pellet reward. The data suggested a successive negative contrast effect (SuNCE) in Experiment 2 with solid pellets, but not in Experiment 1 with liquid solutions. The findings are briefly considered in light of the sequential and frustration accounts of the SuNCE. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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