The effects of birth order on an individual's levels of stimulation

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A recent study involving eighteen rhesus monkeys suggests that birth order may influence cortisol levels, a hormone associated with stress and activity. The research indicates that firstborn monkeys exhibit significantly higher cortisol production in stimulating situations compared to their younger siblings. This pattern is also observed in firstborn humans during similar stress-inducing scenarios. Additionally, the study notes that first-time mother monkeys have elevated cortisol levels during pregnancy compared to those with multiple offspring. However, it's important to clarify that this study is not an actual research publication but rather an illustrative example for GRE essay prompts, which may lead to misunderstandings about its validity and implications.
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A recent study of eighteen rhesus monkeys provides clues as to the effects of birth order on an individual's levels of stimulation.


Could someone please explain the bold part?
 
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At the risk of stating the obvious: have you tried to read the study? Or at least the abstract?
 
Please post a link to the study so that members can know what you're talking about.
 
I don't have link. But here is the whole text that I have.

"A recent study of eighteen rhesus monkeys provides clues as to the effects of birth order on an individual's levels of stimulation. The study showed that in stimulating situations (such as an encounter with an unfamiliar monkey), firstborn infant monkeys produce up to twice as much of the hormone cortisol, which primes the body for increased activity levels, as do their younger siblings. Firstborn humans also produce relatively high levels of cortisol in stimulating situations (such as the return of a parent after an absence). The study also found that during pregnancy, first-time mother monkeys had higher levels of cortisol than did those who had had several offspring."
 
It's not a real study, it's an essay example for the GRE.

EXAMPLES OF ARGUMENT TOPICS.

Each Argument topic consists of a passage that presents an argument followed by specific task instructions that tell you how to analyze the argument. The wording of some topics in the test might vary slightly from what is presented here. Also, because there may be multiple versions of some topics with similar or identical wording but with different task instructions, it is very important to read your test topic and its specific task directions carefully and respond to the wording as it appears in the actual test.

1) The following appeared as part of a letter to the editor of a scientific journal.

“A recent study of eighteen rhesus monkeys provides clues as to the effects of birth order on an individual’s levels of stimulation. The study showed that in stimulating situations (such as an encounter with an unfamiliar monkey), firstborn infant monkeys produce up to twice as much of the hormone cortisol, which primes the body for increased activity levels, as do their younger siblings. Firstborn humans also produce relatively high levels of cortisol in stimulating situations (such as the return of a parent after an absence). The study also found that during pregnancy, first-time mother monkeys had higher levels of cortisol than did those who had had several offspring.”

Write a response in which you discuss one or more alternative explanations that could rival the proposed explanation and explain how your explanation(s) can plausibly account for the facts presented in the argument.

http://poetsandquants.com/2011/02/0...riting-section-of-the-gre-test/1347718731000/
 
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