Larry V. Hedges
Encyclopedia
Larry V. Hedges is a researcher in statistical methods for meta-analysis
and evaluation
of education policy
. He is Professor of Statistics and Social Policy, Institute for Policy Research, Northwestern University
. Previously, he was the Stella M. Rowley Distinguished Service Professor of Education, Sociology, Psychology, and Public Policy Studies at the University of Chicago
.
He is a member of the National Academy of Education and a fellow of the American Academy of Arts and Sciences
, the American Educational Research Association
, the American Psychological Association
, and the American Statistical Association
.
He has authored a number of articles and books on statistical methods for meta-analysis
, which is the use of statistical methods for combining results from different studies. He also suggested several estimators for effect size
s and derived their properties. He carried out research on the relation of resources available to schools and student achievement, most notably the relation between class size and achievement.
Meta-analysis
In statistics, a meta-analysis combines the results of several studies that address a set of related research hypotheses. In its simplest form, this is normally by identification of a common measure of effect size, for which a weighted average might be the output of a meta-analyses. Here the...
and evaluation
Evaluation
Evaluation is systematic determination of merit, worth, and significance of something or someone using criteria against a set of standards.Evaluation often is used to characterize and appraise subjects of interest in a wide range of human enterprises, including the arts, criminal justice,...
of education policy
Education policy
Education policy refers to the collection of laws and rules that govern the operation of education systems.Education occurs in many forms for many purposes through many institutions. Examples include early childhood education, kindergarten through to 12th grade, two and four year colleges or...
. He is Professor of Statistics and Social Policy, Institute for Policy Research, Northwestern University
Northwestern University
Northwestern University is a private research university in Evanston and Chicago, Illinois, USA. Northwestern has eleven undergraduate, graduate, and professional schools offering 124 undergraduate degrees and 145 graduate and professional degrees....
. Previously, he was the Stella M. Rowley Distinguished Service Professor of Education, Sociology, Psychology, and Public Policy Studies at the University of Chicago
University of Chicago
The University of Chicago is a private research university in Chicago, Illinois, USA. It was founded by the American Baptist Education Society with a donation from oil magnate and philanthropist John D. Rockefeller and incorporated in 1890...
.
He is a member of the National Academy of Education and a fellow of the American Academy of Arts and Sciences
American Academy of Arts and Sciences
The American Academy of Arts and Sciences is an independent policy research center that conducts multidisciplinary studies of complex and emerging problems. The Academy’s elected members are leaders in the academic disciplines, the arts, business, and public affairs.James Bowdoin, John Adams, and...
, the American Educational Research Association
American Educational Research Association
The American Educational Research Association, or AERA, was founded in 1916 as a professional organization representing educational researchers in the United States and around the world....
, the American Psychological Association
American Psychological Association
The American Psychological Association is the largest scientific and professional organization of psychologists in the United States. It is the world's largest association of psychologists with around 154,000 members including scientists, educators, clinicians, consultants and students. The APA...
, and the American Statistical Association
American Statistical Association
The American Statistical Association , is the main professional US organization for statisticians and related professions. It was founded in Boston, Massachusetts on November 27, 1839, and is the second oldest, continuously operating professional society in the United States...
.
He has authored a number of articles and books on statistical methods for meta-analysis
Meta-analysis
In statistics, a meta-analysis combines the results of several studies that address a set of related research hypotheses. In its simplest form, this is normally by identification of a common measure of effect size, for which a weighted average might be the output of a meta-analyses. Here the...
, which is the use of statistical methods for combining results from different studies. He also suggested several estimators for effect size
Effect size
In statistics, an effect size is a measure of the strength of the relationship between two variables in a statistical population, or a sample-based estimate of that quantity...
s and derived their properties. He carried out research on the relation of resources available to schools and student achievement, most notably the relation between class size and achievement.