Question: what is independent and dependent variable? Access the internal and external validity ( consider threats to internal and external validity, sources of bias, and strategies

  1. what is independent and dependent variable?
  2. Access the internal and external validity ( consider threats to internal and external validity, sources of bias, and strategies used to enhance both types of validity)

https://onlinelibrary.wiley.com/doi/full/10.1038/oby.2007.271.

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