You have been selected to take part in an important experiment.

A few hundred fans are taking part in an on-line betting experiment at http://www.youbet.com.

The companies involved all recognize they are taking part in an experiment that may well be ahead of its time.

If a team of scientists asks you to take part in a mind-bending experiment, say no.

The agency obliged by offering her the chance to take part in a long-planned experiment.

Who's going to be stupid enough to take part in an experiment like that?

Selected people take new drugs in an experiment (clinical trial) first before the drug is made available for public use.

In one, first-year graduate students were asked to take part in an experiment.

"Then, I was delighted to take part in an important social experiment."