As kevinwuboo said in this thread: There are a few points from this publication that are suspicious: 1. There's no mention of funding sources for this study.

As kevinwuboo said in this thread: There are a few points from this publication that are suspicious: 1. There's no mention of funding sources for this study. 2. It's a small sample size of "two major studios". 3. Most importantly, this study isn't peer reviewed.