Too few researchers understand what statistical significance testing does and does not do, and consequently their results are misinterpreted. This Digest explains the concept of statistical significance testing and discusses the meaning of probabilities, the concept of statistical significance, arguments against significance testing,…

This study analyzes the ways in which school boards assess and utilize evaluation data and their attitudes toward testing. Interviews with 27 school board members from 10 districts indicate that board members tend to rely on informal working knowledge over formal information, and on district administrators' judgments. Findings suggest that simple…