One of the most annoying things about "leadership development" classes: The amount of #JunkScience that instructors use to support whatever point they're trying to make. So I went down a rabbit hole to find the source of a particularly dubious claim I encountered yesterday. What was supposed to be a 1990s study from someone at U of Chicago turned out to be a 1957 dissertation from Wayne State. Somewhat amazingly, the diss has all the raw data (in a scanned pdf). https://education.wayne.edu/eer_dissertations/1958_clark.pdf