CRIM 103 Lecture 3: Chapter 3 – Crim 103

• School: Simon Fraser University
• Department: Criminology
• Course: CRIM 103
• Professor: Evan Mc Cuish

Document Summary

Biopsychologists psychologists who study the biological aspects of behavior. They try to determine which genetic and neurophysiological variable play a part in criminal behavior. Dizygotic twins fraternal twins; develop from two different fertilized eggs and are no more genetically alike than nontwin siblings. Monozygotic twins identical twins; develop from a single egg, always of the same sex and share the same genes. Traditional behavior genetics view behavioral differences: influences attributable to genetic effects, environmental influences shared by siblings, influences that arise from unshared environmental experiences that makes siblings differ from one another. Shared environments common environments; include prenatal and life experiences affecting both twins in the same way. Nonshared environments include living experiences that are different for each twin, such as being raised in a different home environment, participating in different activities, or even attending different schools. The magnitude of genetic and nonshared environmental influences increases as a person gets older, whereas the magnitude of shared environmental influences decreases.