The paper referenced in the article is available here: <a href="http:&#x2F;&#x2F;scottbarrykaufman.com&#x2F;wp-content&#x2F;uploads&#x2F;2014&#x2F;07&#x2F;Macnamara-et-al.-2014.pdf" rel="nofollow">http:&#x2F;&#x2F;scottbarrykaufman.com&#x2F;wp-content&#x2F;uploads&#x2F;2014&#x2F;07&#x2F;Macn...</a>