Natural experiments

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Across
  1. 3. provided by this type of experiment
  2. 6. type of validity that is high in this experiment
Down
  1. 1. reasons that are able to be overcome due to the method of this type of experiment
  2. 2. the type of differences that would be difficult to control for in this type of experiment
  3. 4. how often naturally occurring events that we would study with this method
  4. 5. the type of issues that are the focus in this type of experiment
  5. 7. the type of participant allocation that may not be possible with this type of experiment