Sentence spacing studies analyse the effects of sentence spacing techniques on the readability of text. The only direct scientific studies have been conducted by researchers from the University of Georgia, for on-screen text. There are currently no direct sentence spacing studies for printed text. The direct studies, started in 2002, analysed single, double, and triple sentence spacing to determine what was most readable on screen. The researchers concluded that their tests did not show a statistically significant difference between the various techniques, but that further testing was needed.