We have the first early results on productivity from these tools and one is a controlled experiment that was done with people writing business writing.
Scientists have only recently started carefully testing Thayer's century old idea in controlled experiments to see if it's really as universal as he claimed.
A team of researchers from the University of New York conducted a randomized control trial with 691 depressed patients from 83 physician practices across England.
And without the herbivore effect in the model-so in the control run-we found that only 50 percent of the permafrost area would remain by the year 2100.
Archival voice: Celluloid, one of the earliest of plastics… Conservators also have turned to controlled experiments to get a grasp on how plastic artifacts degrade.
The current study was not a controlled experiment designed to prove how the amount or type of protein people eat might directly affect the length of their lives.
Peter Rothwell at the John Radcliffe Hospital in Oxford and his colleagues looked at deaths due to cancers during and after randomised trials of daily aspirin.
And in the HUD experiment, sociologists compared how the measures of well-being changed for the control group, compared to those for the experimental group.