## Abstract We reply to the commentaries on the lead papers by Neale et al. [1994a] and Duffy and Martin [1994]. Topics covered include power calculations, crossβsectional measurement vs. lifetime reports, the appropriateness of the direction of causation (DOC) model, extensions to study causation
Commentary: Direction of causation models
β Scribed by Jack Goldberg; Viswanathan Ramakrishnan
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 309 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0741-0395
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## THE DIRECTION OF CAUSATION MODEL My comments here are stimulated by the interesting lead articles on the "Direction of Causation" (DOC) model by Neale et al. [I9921 and by Duffy and Martin [1992]. In this paradigm, MZ and DZ twin paris are measured on at least two variables (X and Y ) , and a v
A recent multivariate extension of the classical twin study in theory allows the inference of the direction of causation between correlated traits solely using crosssectional data. In this paper we briefly review this model and assess its usefulness by applying it to a number of pairs of biological
## Lidz offers a new critique of what he calls the ''strong version'' of informed consent. The critique is part of the larger question ''How should we define ethical research?''. He describes a formal model where I is adequate information about the nature, risks, and benefits of a clinical experi