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External variables - Freshman Essays

External variables

***Number one is already done and is attached***

You are only required to answer questions 2&3

  1. Define the following terms in your own words
    • Variable
    • Operationalization
    • Sample
    • Scale
    • Measurement
    • Measurement error
    • Causation
    • Plausible rival explanations
    • Hypothesis
    • Reliability
    • Unit of analysis
    • Four main types of validity (conclusion, internal, external and construct)
  2. Explain how the terms are relevant to a study investigating as you have conceptualized it at this point. If you have not yet conceptualized a study, make one up or use one you read about in a previous course.
  3. Describe any issues, including threats, which you might encounter in putting together a study on the research topic you have selected.

Length: 5-7 pages