That&#x27;s really interesting, especially with respect to the personality trait recovery. I&#x27;m particularly amazed given that I&#x27;ve never been able to replicate the Big5 model in its entirety against particular datasets.<p>Only commenting on that portion, as it&#x27;s what I know. The author doesn&#x27;t appear to give any indication of which test was used, and where the sample was taken from. This makes me a little suspicious, but its probably just a disciplinary thing.<p>Additionally, many tests reduce the pool of available questions for a scale after testing it against against other scales + theory. This means that what the author is recovering, is the scale imposed on the items by the original authors.<p>Nonetheless, this has forced me to reinvestigate the Big5 model, so it&#x27;s not all bad :).<p>Massive appreciation for the links.