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Wednesday, August 25, 2010

Taste Aversion - One Trial Learning


žA taste-aversion is a conditioned response that results from a person or animal establishing an association between a particular food and being or feeling ill after having consumed it at some time in the past.

žThe association is usually the result of a single experience & the particular food will be avoided in the future.

žSimilar to CC as there is an association between a CS( smell/taste of food) and the UCS (nausea producing substance).

žThis tends to happen with one trial.

žOne-trial learning is a form of learning involving a change in behaviour that occurs with only one experience.

žWhether one-trial learning is a particular type of CC is still a topic of some debate.

CC vs. One-trial learning

žCC responses usually take a number of associations or pairings to occur & can extinguish relatively quickly.

žIn CC, the CR occurs immediately after the CS is presented.

žOne trial learning is quickly acquired & considerably resistant to extinction (because UCR, feeling sick, is very powerful.

žIn one-trial learning, the CR could occur as much as a day or so after the food (CS) was consumed.

*CC and one-trial learning both involve automatic, involuntary responses that are acquired in a passive manner, i.e., the person or animal does not make a deliberate decision to perform a behaviour for an intended outcome.

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