Of course "Audience participation" could also refer to the home audience participating and playing along, one reason why shows like "Family Feud", "Wheel of Fortune", "The Price is Right" and "Jeopardy!" have had such successful runs.
I remember listening to a Bob Stewart interview on youtube recently, and he said one of the key components for a successful game show is to get the home audience talking or yelling at the TV set.
Incidentally, Mr. Blumenthal, thank you for the very kind reply and words. I was most humbled by them! I was curious if you ever met or interacted in any way with other game show producers such as Bob Stewart, Stefan Hatos & Monty Hall, Merrill Heatter & Bob Quigley, or Merv Griffin, and if so, in what capacity did you interact with them, and what was your general opinion about them?