Rats were transported from their home cages to a test box and were then shocked. The researchers then examined freezing behavior in response to both the test box and the procedures used to transport the rats to it (Bevins et al. 2000). This best illustrates learning. a. operantb. Pavlovian

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality. potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english