Based on her review of relevant scientific studies, a researcher believes that there is a relationship between the frequency of a baby's crying and whether it was nursed at set intervals or on a demand schedule
If this belief were tested by experimentally manipulating feeding schedules, the feeding schedule would be called the:
a) independent variable.
b) dependent variable.
c) extraneous variable.
d) control factor
ANS: A, The manipulated variable is independent, and the observed or measured variable is dependent.
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