In this paper, the author considers certain aspects of the problem of obtaining unbiased information about the merits of a program or product, whether for purposes of decision making or for accountability. The evaluation of personnel, as well as the evaluation of proposals and evaluations, generally involves a different set of problems than those…

Given the policy imperative of using multiple measures for state education accountability under the No Child Left Behind Act (NCLB), this study examines similarities and discrepancies between the National Assessment of Educational Progress (NAEP) and the states' own math assessment results in Kentucky and Maine, with a focus on 3 major academic…

As the number of after-school programs has expanded, states are increasingly interested in information that helps in the design, selection, and management of such programs. With the sponsorship of Stone Soup Child Care Programs in California, the RAND Child Policy Project and the Promising Practices Network was commissioned to measure adherence of…

Beginners in many disciplines learn that correlation never proves causation, but sometimes, even in public health, correlation, mistaken for causation, becomes the basis for policy and great expenditures of public and private money. "True experiments" with random assignment to experimental and control groups hold a special place in the…