Dear Colleagues,

I am writing to let you know about an online article that I recently published at the Mad in America website. The title of the article is “Twenty-Two Invalidating Aspects of the Minnesota Study of Twins Reared Apart (MISTRA).” This article brings together and sharpens my 20-year analysis of the famous Minnesota reared-apart twin study, and covers several important problem areas not discussed in my previous publications.

There are two versions of the article: the full version (about 30,000 words), and the abridged version (about 6,000 words). The relevant URLs are as follows:


Blog-Post Announcement of the Article (with links):


Full Version:


Abridged Version:



I hope that you will find my analysis to be of interest. Please feel free to forward this announcement to anyone who might be interested.



Jay Joseph, Psy.D.