Related Experiment Video
Updated: May 14, 2026

Use of a Video Scoring Anchor for Rapid Serial Assessment of Social Communication in Toddlers
Published on: March 14, 2018
Nonshared environmental effects on adulthood psychopathic personality traits: results from a monozygotic twin
Kevin M Beaver1, Michael G Vaughn, Matt Delisi
1College of Criminology and Criminal Justice, Florida State University, 634 W Call Street, Tallahassee, FL 32306-1127, USA. kbeaver@fsu.edu
Abstract:
An emerging body of empirical research has revealed that nonshared environmental factors are associated with explaining variance in measures of psychopathy and psychopathic personality traits. The current study adds to this existing knowledge base by analyzing a measure of psychopathy derived, in part, from the five factor model in a sample of monozygotic (MZ) twin pairs drawn from the National Longitudinal Study of Adolescent Health. The results of the MZ twin difference scores analysis revealed that nonshared environmental factors found within the family were unrelated to between-twin differences in psychopathic personality traits. Only one nonshared factor--levels of self-control--consistently predicted psychopathy. We conclude by discussing the implications of our findings and the limitations of our study.
Related Concept Videos
Behavioral Genetics and Its Designs
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
Personality Theory by Eysenck and Eysenck
In the extroversion/introversion dimension, highly extroverted people are sociable, outgoing, and easily connect with others. In contrast,...
Dark Triad and Person Perception
Human Genetics
The complex relationship between genetics and psychology is observable through common biological components such...
Gene-Environment Interactions
Introduction to Personality Psychology
Early Theories of Personality
The study of personality dates...

