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MMLU / When one uses a time-series design to evaluate a program, fluctuation in the…

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question

When one uses a time-series design to evaluate a program, fluctuation in the outcome slope can be accounted for by various alternative hypotheses. According to Campbell and Stanley, the most probable alternative is that

choices

  1. a simultaneous event produced the fluctuation
  2. participants dropped out of the group, reducing the size of the sample
  3. aging effects were unduly influential
  4. test—retest reliability is inadequate

subject

professional_psychology

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