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Question 1. a. Explain what is meant by the terms ‘artifact', ‘confound', and ‘noise'.

b. How do artifacts and confounds relate to internal validity and/or external validity?

c. How do artifacts and confounds relate to random selection and/or random assignment?

d. The act of studying people may change them. Briefly describe three safeguards researchers can take to prevent these effects from introducing confounds or artifacts into psychological research.

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