Baseline characteristics of the Analytic Sample According to Mean Reaction Time. Hagger-JohnsonGareth J. DearyIan A. DaviesCarolyn WeissAlexander David BattyG. 2014 <p><i>Note</i>s.</p>a<p>Fast/medium/slow groups derived from tertiles of simple reaction time.</p>b<p>P value for linear trend.</p>