As far as choosing the participants themselves is concerned, that's not really all that different from ordinary research - the criteria according to which the participants are chosen may be something as simple as the age bracket they fall into, (Q37) or the researchers may select them according to their income, or they might try to find a set of people who all use a particular product, for example.
The temperature won't fall these days.
Totally exhausted, he tore his clothes off and fell into bed...
There's a danger of the government falling because it will lose its majority...
Another wave of troops followed the first, running past those who had fallen.
The woman gripped the shoulders of her man to stop herself from falling...
We watched buildings fall on top of people and pets...
Ollin: Finally, would you like to share with my readers all the exciting stuff going on with your fiction this fall, and how they can check it out?