The seven chapters of this special issue explore problems in how to better understand the reasoning process that is used to establish evaluative conclusions. The many unanswered questions about reasoning should stimulate further investigation of the meaning of sound evaluative reasoning. (SLD)

A useful evaluation of an education program is one that adds to the body of timely, relevant evidence to increase the likelihood that policy decisions improve program performance. This definition focuses on performance rather than change and recognizes that studies can't guarantee the use of their findings but can only increase the likelihood of…