When considering the whole litter, piglets had a preference for previously-used teats and competed to get access to them.
Control hamsters showed a significant preference for the previously paired chamber (t18 = 2.2664, P = 0.02), whereas those that had been jet-lagged continued to show no preference (t18 = 1.113, P = 0.28; Figure 3C).
After the final 15% concentration, all bottles were washed thoroughly and water placed in all bottles and the test was continued for an additional two days to determine the rate of extinction of the preference for the previously sucrose filled bottle.
Over 90 s of the test, flies' preference for a previously shock-paired visual stimulus is decreased in comparison to an unpaired visual stimulus.
We expected (1) experienced individuals to remember the task and show a preference for their previously learned technique and (2) naïve individuals to learn socially from skilled family members to solve the task using the same technique.
For example, the preferences for TBAs previously identified were attributed to factors related to tradition, availability and cost, which when combined, resulted in the 'dominance' of TBAs as the first choice of delivery provider.
Immediately after acquisition, the pups underwent a two-odor choice test, which showed preference for the odor previously paired with the warm temperature, thus showing conditioning.
Soon after birth therefore, newborns recognize and show a preference for someone who previously interacted with them verbally.
The control animals developed a clear preference for the chamber previously containing the wheel, dwelling approximately 3 times longer in this chamber (Probe 1; t16 = 4.620, P<0.001; Figure 3B).
The retention of the previous training would be reflected if hamsters exhibited a preference for the compartment that previously contained the activity wheel.
