What was the main methodological flaw in Brady's "ulcers in executive monkeys" study?
A)because the animals were in restraining chairs for so long, a maturation effect occurred
B)the executive monkeys were more ulcer-prone than the control group monkeys
C)because the study was completed in another historical era, there is no external validity
D)because most of the monkeys died, attrition was a problem

Question

Quizplus · Accepted Answer

The main flaw was that the executive monkeys were not randomly assigned and were more ulcer-prone than the control group, leading to biased results.

What Was the Main Methodological Flaw in Brady's "Ulcers in Executive