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Taste-sickness associations in young rats over varying delays,stimulus, and test conditions |
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| Authors: | Gerard M Martin W K Timmins |
| Institution: | 1. Australian National University, Canberra, A.C.T., Australia 2. Department of Psychology, Memorial University, A1B 3X9, St. John’s, Newfoundland, Canada 3. School of Arts, D.D.I.A.E., Darling Heights, 4350, Toowoomba, Queensland, Australia |
| Abstract: | We showed, as had previous investigators, that young rats formed taste-sickness associations that were weaker than those of mature rats; associations were not formed over a delay greater than 45 min, and aversions did not survive a 60-min test session. The difficulty young rats had withholding consumption and their poor sensitivity to taste and sickness contributed to the weak aversions. Choice tests revealed aversions that had apparently extinguished during a no-choice test, and animals that were allowed to mature prior to the first test readily withheld consumption for 60 min. Furthermore, young rats formed an aversion over a delay of 2.5 h when the concentrations of saccharin and lithium chloride were increased. Aversions to the stronger saccharin did not extinguish over two one-bottle tests and were retained for 52 days. |
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