landtuna said:
But PPM has made a big difference beside that of just measuring who is listening to whom. You said it earlier yourself - you lose 3 PPM listeners out of 10 in any given moment you take a 30% hit. Those 3 listeners might be back after your 8-minute commercial block ends so it evens out over time. TV, which is also ad-supported, measures complete programs, not time segments (although it does measure drop-off after program starts). It seems radio needs something less concise than minute-by-minute measurements (citing the "oh wow!" discussion here and the occasional "stiff").
Radio is not a program based medium. You can pretty much tune in an out at random and miss neither the beginning nor the end.
Still, the basis for radio measurement is not the "minute" but the quarter-hour. If the PPM detects you listening in any five of the 15 minutes in each quarter hour, you are credited with that particular quarter hour. In the diary, five minutes, sequentially, gets you credit.
Advertisers have long used circulation for print, ears for radio, sets for TV, to determine the potential audience for a commercial. They know that most people don't pay attention. But the idea is to make impressions. To measure "listening" as opposed to "hearing" would involve a degree of intrusion into a person's life that would be so extreme as to bias the findings via "methodology bias."
Radio is a medium. To create sales requires not just a medium, but a message that contains something appealing to a consumer and must satisfy concerns like location, pricing, availability, sizes, models, etc.
If I hate pickup trucks, no amount of F-150 ads will make me go see one. But if I have a pickup, and the old one is getting pretty grungy, I will pay attention when an add offers one at a place I'm near, on the right terms, in the model and color I want...
It's no different than the guy yelling "Hot Dogs" in the stands at the ball game. If I am not hungry, I don't even hear him. But if I am, oh boy, am I going to break my diet. And put lots of mustard and relish on mine, too.