QUOTE(Verity @ Jan 3 2009, 02:58 AM)

I know a guy who used to work for Nielson. They hook up willing households to a crazy electronics monitoring setup which tracks TV "on" time and channels tuned in addition to a few other typical household entertainment devices.
They can track how much time you've spent playing back, for example, VHS tapes in your player - but not which exact titles you were watching. I suspect the Xbox1 numbers are such an example; Many people (like myself) keep an Xbox1 around as XBMC media player, which would perhaps show an outsized "usage" amount even though there aren't any new games on it.
AGB Nielsen don't have the new contract any more.
TNS Global do. I currently work for the Media division installing and repairing the monitoring equipment. New panel goes live 2010. Nielsen's figures were all over the place so our system is more accurate.
Signatures given out for games machines and DVD etc are single signatures that tell us when the machine is on and off, but as quite rightly pointed out, does not tell you the content. Only broadcast content is signature matched.
The monitoring is very accurate down to the second the Tv is switched on and off...but of course the sampled panel is not the whole nation.
As for games consoles usage. Consoles are logged as game only now not in specific model groups.
They can log when the console is in use but not what it is being used for or what game is in use. the only way to determine that is to match usage signatures to known signatures, meaning every possible combination of stuff done on every machine including all games available for that machine would have to be logged as a source for the matching.
This post has been edited by Chancer: Jan 3 2009, 09:56 PM