associative learning trait contextual fear conditioning behavior trait 2013-04-08T12:14:44Z 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). CMO:0004052 Trait.ontology VT:0010529 caripark fear-related behavior trait