Describe and discuss validity and reliability

please answer each questions separately and fully. please have atleast 150 words in each response. must use sources i have provided.
1. Describe and discuss validity and reliability. Identify the threats to experimental validity. How would you go about designing an experimental study that will control for/reduce any potential threats to validity and reliability in your study? Why is it important to be aware of these threats? Provide at least two scholarly sources used to justify your responses.
source: Balkin, R., & Kleist, D. (2017). Counseling research: A practitioner-scholar approach. Wiley. ISBN-13: 9781119375425
2. What are the three key aspects of an experimental design? Identify a research project that utilizes comparison group models. Explain how you would determine the validity and reliability to both the design and the methods of your research.
source:Balkin, R., & Kleist, D. (2017). Counseling research: A practitioner-scholar approach. Wiley. ISBN-13: 9781119375425
3. When testing a client, what two ways could a counselor’s behavior affect the validity of the data gathered from the test results? In what ways could a counselor’s behavior affect the reliability of the data gathered from the test results? Explain.
source: Cohen, R. J., & Swerdlik, M. E. (2018). Psychological testing and assessment (9th ed.). McGraw-Hill Companies. ISBN-13: 9781259870507
4. Could a psychological test and assessment be invalid and still have reliability? Why or why not?
source: Cohen, R. J., & Swerdlik, M. E. (2018). Psychological testing and assessment (9th ed.). McGraw-Hill Companies. ISBN-13: 9781259870507

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