Identify one potential Threat to Internal Validity that might arise in a specific intervention that is of particular interest to you.

In Chapter 4 of the textbook, the author provides descriptions and examples of criteria for inferring effectiveness. In other words, asking the question, how do we know an intervention works? After reading the chapter briefly respond to the following questions in your own words: 1. Describe your understanding of the criteria for inferring Internal Validity (a.k.a. making a causal inference). 3. Provide an example of a Measurement Issue that might arise in the specific intervention that you identified in the prior question. 4. Describe your understanding of External Validity.

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