Genetic "clocks" and "soft" events: a twin model for pubertal development and other recalled sequences of developmental milestones, transitions, or ages at onset.

@article{Pickles1998GeneticA,
  title={Genetic "clocks" and "soft" events: a twin model for pubertal development and other recalled sequences of developmental milestones, transitions, or ages at onset.},
  author={Andrew Pickles and Kerrie Pickering and Emily Simonoff and Judy L. Silberg and Julian Meyer and Hermine H Maes},
  journal={Behavior genetics},
  year={1998},
  volume={28 4},
  pages={243-53}
}
We propose and explore a twin model to examine the basis for synchrony that often characterizes different facets of normal development. In so doing we also present an approach to the analysis of "soft" events; events for which available reports of dates or ages of occurrence are unreliable or inconsistent. Discrepancies among reports are accounted for by a statistical measurement model. This combines current status error reflecting uncertain definition of onset and two mechanisms for the… CONTINUE READING