Flow Diagram of searching and sifting for Stage 2.

<p>Search Results up to date as of <b>22</b>^<b>nd</b><b>December 2014</b> (original search and update combined). Final total for data extraction = 126 of which 15 papers assessed the measurement properties of relavent behaviour tools.</p

Flow Diagram of Searching and Sifting for Stage 1.

<p>Search results are up to date as of 17^th July 2013 (original search and update combined). Final total for data extraction = 184 (of which 29 papers included a measure of behaviour problems).</p