reliability and validity in a study?

Answer the following questions
1. How do researchers determine reliability in a study? Describe the major types of each.
2. How do researchers determine validity in a study? Describe the major types of each.
3. As a member of a journal club that is discussing the instructor assigned article in this course, what would you identify as strengths and / or weaknesses of the reliability and validity section of this article? (use uploaded article to answer this question)