Refers to one of three designations on CrimeSolutions.gov indicating the extent of the evidence that a program works. The three designations are: "Effective" (), "Promising" (), and "No Effects" (). A single study icon is used to identify programs that have been evaluated with only one study. A multiple studies icon () is used to represent a greater extent of evidence supporting the evidence rating. The icon depicts programs that have more than one study in the evidence base demonstrating effects in a consistent direction.For practices, the rating designations take a slightly different meaning. Read more About CrimeSolutions.gov or about Program Review and Rating from Start to Finish or about Practice Review and Rating from Start to Finish.