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Part 1: The assignment requires student participation in a psychology experiment
Part 1: The assignment requires student participation in a psychology experiment to obtain the perspective of a participant in psychological research.
Participate in the “Reaction Time Color” study and read the related information. Next, prepare a word document with the answers to the following questions:
Next, prepare a word document with the answers to the following questions:
1. What is the independent variable and corresponding levels?
2. What is the dependent variable?
3. How might the outcome of the study be different if you used a between-subjects design? What would be the best type of between-subjects design?
4. What extraneous variables might contribute to the outcome of the study?
5. What might a follow-up study include?
Part 2: Dr. Jones conducted a study examining the relationship between the amount of sugar in a child’s diet and the activity level of the child. A sample of 30 four-year-old children from a local preschool was used in the study. Sugar consumption was measured by interviewing the parents about each child’s diet. Based on the result of the interview, each child was then placed into one of two groups: high sugar consumption and low sugar consumption. Activity level was measured by observing the children during a regular preschool afternoon. Finally, Dr. Jones compared the activity level for the high-sugar group with the activity level for the low-sugar group. Explain why Dr. Jones’ study is not an example of the experimental research strategy and provide way that it can be tested experimentally.
Part 3: Time-related factors and other order effects can threaten internal validity for some within-subjects experiments. Describe the kind of study for which these factors can be a problem and explain how they can be a confounding variable in some within-subjects designs.
Part 4: Does the presence of a significant interaction change the interpretation of significant main effects? Provide one example to support your answer. (Be sure to include a minimum of two independent variables).
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