Julio served in the war in Iraq and was severely traumatized when a rocket-propelled grenade exploded next to his Humvee. Recently, Julio was studying in the library and a large book fell off a high shelf and banged on the floor. The noise brought Julio instantly to his feet. In terms of classical conditioning, his response can best be explained by

stimulus generalization                                                                                                                  

Explanation:

Stimulus generalization: In psychology, the term "stimulus generalization" is one of the different parts of the classical conditioning theory which was proposed by Ivan Pavlov.

According to him, stimulus generalization is defined as the propensity of a particular conditioned stimulus to trigger the same response once that particular responded is being conditioned. In other words, an individuals response towards a particular stimulus in the same manner as he or she will respond towards a similar stimulus.

In the question above, Julio's response can be best explained by stimulus generalization.

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