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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?

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As established in the previous write-ups, my topic is “Whether an early intervention is effective in diagnosing language impairment and mapping out a solution and why there are different manifestations of language impairment." Three developmental designs could be used to test the validity of this hypothesis, and these include cross-sectional, longitudinal, and cohort –sequential designs. As informed by Bordens and Abbot (2011), the cross-sectional design a researcher usually selects a set of participants from different age groups. In other words, one creates groups founded on chronological ages of the research sample at the time of the inquiry. When using the longitudinal design, a researcher follows a single community of participants over a specified period. The cohort-sequential design combines the cross-sectional and longitudinal developmental designs and allows the...

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