Related Experiment Video
Updated: Dec 15, 2025

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
Twin study of laboratory-induced aggression
Bojana M Dinić1, Snežana Smederevac1, Selka Sadiković1
1Department of Psychology, Faculty of Philosophy, University of Novi Sad, Novi Sad, Serbia.
Abstract:
The aim of this study was to explore genetic and environmental contributions to laboratory-induced aggressive behavior. On a sample of 478 adult twins (316 monozygotic), the Competitive Reaction Time Task was used for aggression induction. The results showed that the initial, basic level of aggression could be explained by both shared (45%) and nonshared environmental factors (55%), while only nonshared environmental factors (100%) had a significant influence on changes in aggression as provocation increased. Genetic factors had no influence on laboratory-induced aggression. The results highlight the importance of environmental factors in shaping situation-specific aggressive responses to provocation.
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...
Aggression
Causes of Social Behavior III: Biological and Environmental Influences

