Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Nonshared environment: a theoretical, methodological, and quantitative review.

E Turkheimer1, M Waldron

  • 1Department of Psychology, University of Virginia, Charlottesville 22903, USA. turkheimer@virginia.edu

Psychological Bulletin
|February 11, 2000
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Establishing weight-based diagnostic reference levels for neonatal chest X-rays.

Radiography (London, England : 1995)·2023
Same author

Concurrent adaptations in maximal aerobic capacity, heat tolerance, microvascular blood flow and oxygen extraction following heat acclimation and ischemic preconditioning.

Journal of thermal biology·2020
Same author

Menthol as an Ergogenic Aid for the Tokyo 2021 Olympic Games: An Expert-Led Consensus Statement Using the Modified Delphi Method.

Sports medicine (Auckland, N.Z.)·2020
Same author

Socioeconomic status amplifies genetic effects in middle childhood in a large German twin sample.

Intelligence·2019
Same author

Oral L-menthol reduces thermal sensation, increases work-rate and extends time to exhaustion, in the heat at a fixed rating of perceived exertion.

European journal of applied physiology·2017
Same author

Neighborhood deprivation and depression in adult twins: genetics and gene×environment interaction.

Psychological medicine·2016
Same journal

Artificial intelligence as a partner in meta-analysis-Research agenda, user recommendations, and speed-accuracy tradeoffs: Commentary on Jansen et al. (2025).

Psychological bulletin·2026
Same journal

Relationships between cognition and daily functioning in adults with bipolar disorder: A systematic review and multilevel meta-analysis.

Psychological bulletin·2026
Same journal

The association between reading anxiety and reading achievement: A meta-analysis and systematic review.

Psychological bulletin·2026
Same journal

Perfectionism is accelerating over time: A cross-temporal meta-analytic review of 35 years of college student data.

Psychological bulletin·2026
Same journal

High math anxiety is associated with lower math achievement across 90 countries: An individual participant data meta-analysis of representative student and adult samples.

Psychological bulletin·2026
Same journal

Is thinking inherently unpleasant? A cautionary note on David, Vassena, and Bijleveld (2024).

Psychological bulletin·2026
See all related articles

Siblings appear no more alike than random individuals when genetics are controlled. The widely accepted "nonshared environment" may not fully explain behavioral differences, suggesting alternative factors are at play.

Area of Science:

  • Behavioral genetics
  • Developmental psychology
  • Family studies

Background:

  • Sibling resemblance is often no greater than that of unrelated individuals when genetic factors are controlled.
  • The concept of nonshared environment (NSE) has been widely accepted since 1987 to explain these behavioral dissimilarities.
  • Existing research often attributes variance in behavioral traits to NSE, a component distinct from shared environmental influences.

Purpose of the Study:

  • To critically review the conceptual underpinnings of nonshared environment.
  • To examine the distinction between environmental variance components and the causal properties of environmental events.
  • To propose a statistical model for shared and nonshared environmental variables and assess the explanatory power of measured NSE.

Main Methods:

Related Experiment Videos

  • Conceptual analysis of environmental variance and its properties.
  • Development of a statistical model incorporating shared and nonshared environmental variables.
  • Quantitative review of empirical studies measuring nonshared environmental variables.

Main Results:

  • Measured nonshared environmental variables explain only a small fraction of the variability attributed to NSE in biometric studies.
  • The distinction between objective and effective environments is crucial for understanding individual differences.
  • The current understanding and measurement of NSE may be insufficient to account for observed behavioral variability.

Conclusions:

  • The substantial variability attributed to nonshared environment in behavioral genetics may be overestimated.
  • Alternative explanations for the preponderance of nonshared environmental variability need to be explored.
  • Further research should refine the conceptualization and measurement of environmental influences on behavior.