# An experimenter is interested in the effect of dosage on symptom expression. She gives one randomly...

An experimenter is interested in the effect of dosage on symptom expression. She gives one randomly selected sample of patients no medicine at all. She gives another sample 20 milligrams (mg) and another sample 40 mg and the final sample 45 mg. What is the independent variable in the study? O Medication Symptom level O Quasi-experiment O Diagnosis Patient status

Here, the researcher wants to study the effect of dosage on symptom expression. So, he randomly selects samples and gives them different dosages of medication. Therefore, the independent variable in this study is The dosage of medication , or simply , medication.

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