Please the answer in 150 words or more. Answer must be in APA format and have at least 1 source cited.
1. In some quantitative studies the terms “external validity” and “generalizability” are portrayed as synonymous. In contrast, Reichardt (2011) makes the claim that external validity and generalizability should be considered distinct concepts. What is external validity? What are the merits of distinguishing between external validity and generalizability of quantitative results?