associative learning trait contextual fear conditioning behavior trait CMO:0004052 Trait.ontology Any measurable or observable characteristic related to the actions or reactions of an organism pertaining to the ability to learn and remember an association between an aversive experience (the unconditioned stimulus (US), usually a shock) and the neutral, unchanging environment (the conditioned stimulus (CS), or the environmental context in this case). 2013-04-08T12:14:44Z VT:0010529 caripark fear-related behavior trait