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conceptual variables

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How could I operationalize the following conceptual variables? Describe operationalizations. Are they self-report, observational, or physiological?

  1. In a study on whether social skills training will increase people’s friendliness, researchers needed to measure friendliness.
  2. One element of an IQ test contained a measure of speed of problem solving.
  3. In a consumer study of people’s interest in electronic products, researchers measure people’s willingness to read books on an e-reader or handheld computer.
  4. In an educational psychology study, researchers wish to measure attention span in children who are working on mathematics problems.
 
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