TheFonz said:
I'm not in the radio business...........just a listener. I'm hearing through the media that the method of taking radio ratings on our town will soon change. They will be using something called "people meters". It seems to be shaking up the radio community a bit. I've always been suspect of radio ratings (how could anyone possibly know how many people listen to a given station at a given time?). Can someone explain what a "people meter" is? Will this improve the ratings system?
The People Meter (really the Portable People Meter or PPM) has been in real time tests for just about a decade. The technology was working when I first saw it in 1995... the meter was the size of a small brick, but it worked. Implementation had to wait on miniaturization of components and better batteries.
Houston has been under "real" (as in "no other survey method") measurement going on 4 years (after two of testing), and markets like LA and NY are in their third year... with this month's releases, about 45 markets will be PPM measured.
Technically, the meter "listens" at ear-level as it is carried by each participant. It's the size of a small pager (remember those?) and it detects as it listens embeded data bursts, up to 12 per minute, ccoustically masked in the station audio. Each burst includes the time and the unique numeric code for each station or encoded HD or web stream or other audio source.
The people with meters are part of what, in surveying, is called a panel. In a panel, the same people continue to participate over long periods of time... in the PPM up to two years. In the diary, there was a new group of participants each week. With a panel, we can get a tightly controlled group that exactly mirrors the general population in miniature so it is affordable and reasonably accurate. And the panel allows ongoing same-user tracking, which the diary did not allow.
In the PPM panel, all members of household units (families, etc.) participate to represent real living dynamics. If one member stops participating, the whole unit is dismissed. Panelists get points from Arbitron they can use to get rewards, and they are constantly contacted if they don't use the meter (it has a motion sensor).
While listeners and those not familiar with polling and sampling might disagree, the users of the data, advertisers, actively asked for this methodology and they do trust measurement based on proportional samples, given their success in doing so and the massive documentation of the ability to do proportional samples.