There is precious little even seen of the performer, and absolutely no instantaneous feedback, the sauce on which a comedian feeds.

But the point of a touchscreen is to provide immediate, instantaneous feedback to create the illusion of physically interacting with the on-screen contents.

There's nothing as educational as the instantaneous feedback of 100 classmates shouting you down when you're caught unprepared or can't justify a position.

It allows students to complete their homework over the web, and receive instantaneous feedback as to the correctness of their responses.

Independent artists rely heavily on social networking sites as a medium to give their fans music, and to get instantaneous feedback on it.

Arthur Zeckendorf added, "It also offers instantaneous feedback to buyers who can move into the units within 20 days."

The cameras allow for instantaneous and candid feedback while the mirrors give instructors the ability to observe while not intruding on participants.

They also helped him buy software for his cash register that gives him instantaneous feedback on sales.

The dial is used to get instantaneous feedback on how screeners are responding to the show, moment by moment.

It is inherently difficult to feel progress, a sense of achievement without instantaneous feedback that all was well.