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  • Test Form
  • An alternate, equivalent version of a test (e.g., Form A and Form B of a Mathematics Problem Solving test). Variations between forms may be the result of re-ordering of items, using completely different test items, or both.
  • True Score
  • A theoretical, error-free score that is not obtained by testing but which varies from the students observed score by some measurement error.
  • TWW
  • Total Words Written