How to create randomized groups Enter each item on a new line, choose the amount of groups unders settings, and click the button to generate your randomized list. Don't like the first team? Just click again until you do. Fairly pick teams without bias. No need to draw names out of a hat. Research Randomizer is a free resource for researchers and students in need of a quick way to generate random numbers or assign participants to experimental conditions. This site can be used for a variety of purposes, including psychology experiments, medical trials, and survey research. Since 2007, the site has generated more than 35.2 billion.