Menstrual-cycle synchrony: problems and new directions for research.

  title={Menstrual-cycle synchrony: problems and new directions for research.},
  author={Jeffrey C. Schank},
  journal={Journal of comparative psychology},
  volume={115 1},
  • J. Schank
  • Published 1 March 2001
  • Psychology
  • Journal of comparative psychology
Since M. K. McClintock (1971) published the 1st study on menstrual synchrony among women, a number of other studies have also reported synchrony using a variety of methods. The most recent reports of synchrony come from A. Weller, L. Weller, and colleagues, and their findings of synchrony have been getting stronger (by their own account). In this article, the author analyzes their new methodology and presents 2 simulation studies that demonstrate how biases and errors can produce synchrony as… 

Figures and Tables from this paper

Methods for obtaining menstrual-cycle data in menstrual-synchrony studies: commentary on Schank (2001).

  • C. Graham
  • Psychology
    Journal of comparative psychology
  • 2002
This commentary focuses on the 2nd of these, recall biases, and other errors that he argued may result from "allowing participants to fill out menstrual-cycle-onset calendars" (p. 3).

Menstrual synchrony can be assessed, inherent cycle variability notwithstanding: commentary on Schank (2001).

Research that has used random control groups has found significantly greater levels of synchrony in their experimental groups, refuting J. C. Schank's arguments.

A multitude of errors in menstrual-synchrony research: replies to Weller and Weller (2002) and Graham (2002).

  • J. Schank
  • Psychology
    Journal of comparative psychology
  • 2002
In her commentary, C. A. Graham stated that A. Weller and L. weller's later research did not use recall data, but the author of this reply shows that this is not true.

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