For this assignment you will write a two-part essay. In Part I, explain the importance of external validity to a research study. Include the following: 
An explanation of the differences between internal and external validity. 
An analysis of the threats to both internal and external validity. 
In Part II of your essay, address the following questions: 
Why is peer review important to your research? 
What criticisms of the peer-review process might impact your research? 
How will understanding the concept of peer review be applied to help you increase your chances of success? 
Support your essay with three peer-reviewed or academically reliable resources from the CSU Online Library. Your paper must be at least three, but no more than four pages in length. The title and references pages do not count toward the page requirement. Adhere to APA Style when constructing this assignment, including in-text citations and references for all sources that are used. Please note that no abstract is needed.