I thought, may be this is just a legend. But when made some research on the internet I saw there are lots of pages about this and even some research centers are telling...
"Participating as paid volunteer in Medical research studies can be an excellent way to help to pay educational costs, supplement your income while working, or fund your travels while spending time in foreign countries."
At the first time it sounds a bit scary. But not all of the researches are dangerous and drug related. As I understand they need people to spend some time at the hospital for a day or more, like being a patient of
- Sleep deprivation
- Time isolation
- Bed rest studies - simulate the effects of prolonged space travel.
- Alcohol, caffeine & nicotine studies
- Exercise, diet & nutrition studies
- Psychology studies (personality, perception, etc.)
- Cognitive studies (memory, concentration, etc.)
- Sensory studies - testing taste, smell, etc
- Visual studies
- Brain wave studies
- Brain imaging studies
- Blood & plasma donation
- Egg & sperm donation
- Consumer product testing - sample new products (food, cosmetics, etc.) and evaluate them.
- Focus Groups - Evaluating products
- Paid opinions - Get paid for your opinions.
Sooo, http://www.gpgp.net/ can help you to find the closest research center to you :)
By the way, I have been in a medical research a year ago :) A good friend of mine Monica was studying about brain waves and needed some monkeys for her researches. It was very simple just clicking to some buttons depending what you see on the screen. And after the test she gave me a free banana :D
If I meet some "hamster travelers" on the way, I promise you I ll do a interview to get some more information about this business! :)