Some political scientists recently published a study on the use of emotional language in briefs filed in the U.S. Supreme Court. After controlling for a variety of factors, they concluded that overtly emotional language correlates to losing the case. Here’s an excerpt from the abstract:
We argue emotional language conveys a lack of credibility to justices and thereby diminishes the party’s likelihood of garnering justices’ votes. The data concur.... [W]e find that parties who employ les emotional language in their briefs aree more likely to win a justice’s vote, a result that holds even after controlling for other features correlated with success, such as case quality. These findings suggest advocates seeking to influence judges can enhance their credibility and attract justice’s votes by employing measured, objective language.
Ryan C. Black, Matthew E.K. Hall, Ryan J. Owens, and Eve M. Ringsmuth, The Role of Emotional Language in Briefs Before the U.S. Supreme Court (December 15, 2015). To read the abstract and to download the study supporting the authors’ conclusions, following one of these links at SSRN: http://ssrn.com/abstract=2703875 or http://dx.doi.org/10.2139/ssrn.2703875.