Differentiate between random sampling and random assignment

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Assignment:

Independent Variable (IV): Sleep Duration

Dependent Variable (DV): Emotional Regulation

(1) Consider the two psychological variables you identified in your originally proposed research design that hypothesized the relationship between two psychological variables. Now, identify a potential mediator variable that you could intuitively incorporate into your design. Then, propose a potential moderator that could intuitively be added to your proposed mediation model. If you tested your new model that includes predictor variable, mediator variable, outcome variable, and moderator variable and found that significant relationships existed among all proposed pathways - what would this mean in terms of study findings?

(2) In what ways are experimental research designs preferable to correlational or descriptive designs? What are the limitations of experimental designs? Be sure to cite the text in your response.

(3) Differentiate between random sampling and random assignment. Which is most important in survey research and why? Which is most important in experimental research and why?

Reference no: EM133878996

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