Reflect on the Are You Equipped Now at the end of the chapter

If the decrease in pain reported by participants was due to internal changes that occurred within the participant over a three month time period, which of the following was a threat to internal validity?

a. selection
b. maturation
c. regression to the mean
d. attrition

B

Political Science

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Indicate whether this statement is true or false.

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Indicate whether this statement is true or false.

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