A psychologist has a theory that a certain mood disorder is largely due to a deficiency of the neurotransmitter ACS2.The psychologist believes that if the theory is correct then increasing the levels of ACS2 in people with that mood disorder will reduce their symptoms of the mood disorder.To test that hypothesis,the psychologist conducts a well-designed experiment.This example best represents:

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This experiment represents deductive reasoning because the psychologist started with a specific theory (deficiency of ACS2 causing the mood disorder), and tested that theory through an experiment designed to confirm or refute it. The hypothesis is being tested through a cause-and-effect relationship, which is characteristic of deductive reasoning.

A Psychologist Has a Theory That a Certain Mood Disorder