Brady's "ulcers in executive monkeys" study was flawed by which of the following threats to internal validity?
A)selection
B)maturation
C)attrition
D)testing

Name: Brady's "ulcers in executive monkeys" study was flawed by which of the following threats to internal validity? A)selection B)maturation C)attrition D)testing
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The study was flawed by selection bias because the monkeys were not randomly assigned to groups, leading to differences in stress levels that could affect the results.

Brady's "Ulcers in Executive Monkeys" Study Was Flawed by Which