IN two separate headings discuss the following. Include reference from :

Bordens, K.S., & Abbott, B.B. (2018). Research design and methods. (10th ed). New York: McGraw Hill Education. Minimum 350 words each topic

Discussion Topic: Aging or Changes Over Time

Think of a research topic in developmental psychology that deals with aging or changes over time (possibly the research idea that you are using for your proposal).

Briefly describe the different developmental designs, and select one that you would use to explore this topic.

Provide a rationale as to why you would use the approach that you selected and why you believe this method is preferable to the other two in this case.

Describe some of the pragmatic issues that researchers face when using the developmental designs and how these issues can threaten the validity of your results.

Finally, take some time to discuss the problem of generational cohorts and whether or not you feel this would be an issue in your hypothetical study.

Discussion Topic: Single-Subject Methods

How are the single-subject methods unique to experimental research?

Think of a problem behavior that you might want to improve upon in one of your future clients, and devise a single-subject design to study the effectiveness of your new intervention.

Which single-subject approach would you use here (baseline, discrete trials, dynamic), and why?