All Images
The bubble-bursting, causality-revealing awesomeness of randomized controlled trials
In the 1990s, a small group of researchers funded by NSF developed a scientifically rigorous way to design complex social experiments that can clearly distinguish those all-important causes from mere correlations and coincidences.
Credit: National Science Foundation/Alice Kitterman
Download the high-resolution JPG version of the image. (36.1 KB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.