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Assessing Relationships 1

  • Pearson Product Moment Correlation
    • Abbreviated r
    • Most used correlational coefficient
    • One used with two group linear relationships
    • Can be used to determine reliability (e.g., test-retest) and Internal Consistency (e.g., split-half, odd-even)
    • Typically works best when both variables are of the interval or ratio scale
  • Point Biserial and Biserial
    • Used with two variables when one variable is not of the interval or ratio scale (e.g., income level and sex or average lifespan and race)