When a psychologist simply records the relationship between two variables without manipulating them, it is called a study. The observed relationship does not by itself reveal which variable the other. This is the problem. Also, the relationship may be due to acontrolling both of the observed variables.

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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