What is the best example of Hill's causal concept of Experiment among the statements below?

Question

BlackTom AI · Accepted Answer

To evaluate Hill's causal concept of Experiment, we look for a statement that demonstrates deliberate manipulation of an exposure and a comparison to a control group.
Option 1: "DDE blocks testosterone receptors in rats" describes a mechanism of action (blockage). While mechanistic insight is valuable, it does not by itself illustrate an experimental manipulation with a comparison group to infer causality.
Option 2: "DDE decreases prostate weight in rats" presents an outcome but lacks a defined control or comparison group. Without specifying what it is compared to, this does not clearly meet the experimental design requirement of a parallel control condition.
Option 3: "DDE decreases prostate weight in rats compared to rats without DDE exposure" explicitly includes both the exposure (DDE) and a clear comparison group (rats without DDE exposure). This aligns with the experimental element of Hill’s criteria, where the effect is assessed under manipulated conditions versus a baseline.
Option 4: "DDE decreases serum testosterone in rats" states a biological effect but, like option 2, does not specify a control or comparison, so it lacks the essential experimental design component.
Option 5: "DDE decreases serum testosterone in rates compared to rats without DDE exposure" contains a similar idea to option 4 but includes a comparative phrase; however, since it refers to testosterone levels rather than a tumorous or organ-weight outcome, it still centers on the outcome rather than the core demonstration of an intervention with a control group. Additionally, the wording has a typographical inconsistency (rates instead of rats), which undermines clarity.
Overall, the statement that best exemplifies Hill’s Experiment is option 3 because it explicitly couples exposure with a well-defined comparison, capturing the essence of manipulating a variable and observing the effect relative to a control condition.

ETX 010 001 SQ 2025 Learning Assignment 20

What is the best example of Hill's causal concept of Experiment among the statements below?

查看解析

登录即可查看完整答案

类似问题

A researcher observes that after prolonged exposure to a chemical, some individuals will in the future develop a disease condition due to that exposure. Which of Hill's criteria does this idea address?

Why did Prof La Merrill emphasize (italics) that breast development (gynomastia) in three pre-pubertal boys with chronic use of lavender and tea tree oil regressed back to the undeveloped typical pre-pubertal male mammary gland after use of those oils stopped?

Which of Hill’s causal considerations is best represented by a baby being born with a cleft palate from a women who binged drank between her first and second months of pregnancy?

Which of these statements best captures Hill’s causal consideration of consistency with respect to the relationship between environmental compartments and pollution?

What is an example of Hill's Specificity? You can choose more than one answer.

In a consumer society, many adults channel creativity into buying things

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单