Read the following statement and answer the question: "Structured preoperative support is more effective in reducing surgical patients' perception of pain and request for analgesics than structured postoperative support."
What type of variable is "Request for analgesics"?
a. Attribute
b. Dependent
c. Extraneous
d. Independent
ANS: B
The dependent variable is the response, behavior, or outcome the researcher wants to predict or explain. In this example, the outcome is "reduced surgical patients' perception of pain and request for analgesics."
The demographic or attribute variables are ones describing the sample. The dependent variable is the response, behavior, or outcome the researcher wants to predict or explain. In this example, the outcome is "reduced surgical patients' perception of pain and request for analgesics."
Extraneous variables are ones the researcher is not interested in, but have an effect in the study. The dependent variable is the response, behavior, or outcome the researcher wants to predict or explain. In this example, the outcome is "reduced surgical patients' perception of pain and request for analgesics."
An independent variable is a stimulus or activity that is manipulated or varied by the researcher to create an effect on the dependent variable. The dependent variable is the response, behavior, or outcome the researcher wants to predict or explain. In this example, the outcome is "reduced surgical patients' perception of pain and request for analgesics."
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