Appreciation Index
...that the BBC have used Appreciation Index ratings to gauge reactions of children to their programming?
...that the <a href="./BBC" id="mwDcw" rel="mw:WikiLink" title="BBC">BBC</a> have used <b id="mwDc0"><a href="./Appreciation_Index" id="mwDc4" rel="mw:WikiLink" title="Appreciation Index">Appreciation Index</a></b> ratings to gauge reactions of children to their programming?