Which of the following scenarios would most effectively demonstrate a violation of the "equal environments assumption" in twin studies?

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which scenario would most effectively demonstrate a violation of the equal environments assumption (EEA) in twin studies.

Option A: 'Monozygotic twins are treated more similarly by their parents compared to dizygotic twins.' This directly describes a situation where MZ and DZ twins experience different environments due to parental treatment. If MZ twins share more similar environments than DZ twins, and yet their traits appear more similar, the increased concordance could be due to environmental similarity rather than purely genetic similarity, thereby illustrating an EEA violation. This is the classic, textbook example of a violation.

Option B: 'Monozygotic twins show higher concordance rates for a trait than dizygotic twins raised in the same environment.' While this suggests a genetic influence (MZ similarity > DZ similarity), it does not specify a difference in environmental treatment or environments between the twin types. If both are raised in the same environment, this scenario aligns with the standard heritability inference rather than demonstrating an EEA violation. So it doesn’t demonstrate a violation per se.

Option C: 'Monozygotic twins experience greater environmental variability than dizygotic twins.' This would imply MZ twins have more diverse environments, which could in theory affect outcomes, but it is not the canonical way EEA violations are demonstrated. The EEA concerns environmental similarity between twin types, not which type experiences more variability overall.

Option D: 'Dizygotic twins are raised in households with greater socioeconomic disparities than monozygotic twins.' This describes a between-family environmental difference that could influence comparisons, but it is less directly about the relative environmental similarity between MZ and DZ twins within the study design, making it a less clear demonstration of EEA violation.

Option E: 'None of the above.' Given that A clearly describes a scenario of differential treatment between MZ and DZ twins, this option would not be correct because there is a scenario that demonstrates the violation.

In summary, the essence of an EEA violation is that the environments of MZ and DZ twins are not equally similar. Option A captures that mismatch in environmental similarity most explicitly, whereas the other options either describe genetic effects under equal environments or describe environmental differences that do not directly illustrate the core violation in how the EEA is tested. The reasoning emphasizes how one would interpret twin concordance in light of environmental similarity, and why the other options fail to demonstrate the violation as clearly.

PSYC_V 305 991 2025W1 Unit 1 Exam

Which of the following scenarios would most effectively demonstrate a violation of the "equal environments assumption" in twin studies?

查看解析

登录即可查看完整答案

类似问题

Traits that have similar concordance values in both monozygotic and dizygotic twins are best-explained by

Jered was adopted as an infant in 1973. Jered has an identical twin who was also adopted in 1973 but by a different family. As an adult, Jered’s personality should most resemble that of:

The research method that would be best at determining that human behavior is either a product of nature or nurture would be______________.

Because identical twins share 100% of their genes and fraternal twins share (on average) 50% of their genes

Which of the following best describes the role of genetics and the environment using twin studies?

From a statistical perspective, which of the following sibling pairs are best considered to have equally similar personality traits?

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