Why twin studies really don't tell us much about human heritability

  title={Why twin studies really don't tell us much about human heritability},
  author={Sidney J. Segalowitz},
  journal={Behavioral and Brain Sciences},
  pages={904 - 905}
  • S. Segalowitz
  • Published 1 October 1999
  • Biology
  • Behavioral and Brain Sciences
The derivation of heritability from human twin studies involves serious methodological flaws. Heritability is consistently overestimated because of biological confounds of twinning, consistent and often gross underestimation of the environmental variance, and nonadditive genetic influences that can hugely exaggerate heritability values. Despite this bad research design, behaviour geneticists continue to publish results implying that their heritability results are valid. 

Timing of pubertal maturation in girls: an integrated life history approach.

  • B. Ellis
  • Psychology
    Psychological bulletin
  • 2004
5 middle-level theories--energetics theory, stress-suppression theory, psychosocial acceleration theory, paternal investment theory, and child development theory--each of which applies the basic assumptions of life history theory to the question of environmental influences on timing of puberty in girls are reviewed.

Metabolomics and the Multi-Omics View of Cancer

This more holistic, multi-omics view portrays cancer as a disease that is much more preventable, easier to understand, and potentially, far more treatable.