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Information on IES-Funded Research
Grant Closed

Representation and Combination of the Results of Multi-site Randomized Experiments in Education

NCER
Program: Statistical and Research Methodology in Education
Program topic(s): Core
Award amount: $449,504
Principal investigator: Larry Hedges
Awardee:
Northwestern University
Year: 2004
Project type:
Methodological Innovation
Award number: R305U040007

Purpose

This research addressed two problems: (1) How to adjust (approximately) analyses that improperly ignored clustering inherent in the design without going through an entire re-analysis, and (2) How to represent and combine the results of several experiments, some of which yield several measures of the same outcome construct when the correlation structure of the outcomes is unknown.

People and institutions involved

IES program contact(s)

Allen Ruby

Associate Commissioner for Policy and Systems
NCER

Products and publications

Book chapter

Hedges, L.V. (2007). Meta-Analysis. In C.R. Rao (Ed.), The Handbook of Statistics (pp. 919-953). Amsterdam: Elsevier.

Journal article, monograph, or newsletter

Hedges, L.V. (2011). Effect Sizes in Three-Level Cluster-Randomized Experiments. Journal of Educational and Behavioral Statistics, 36(3): 346-380.

Hedges, L.V. (2007). Correcting a Significance Test for Clustering. Journal of Educational and Behavioral Statistics, 32(2): 151-179.

Hedges, L.V. (2007). Effect Sizes in Cluster-Randomized Designs. Journal of Educational and Behavioral Statistics, 32(4): 341-370.

** This project was submitted to and funded as an Unsolicited application in FY 2004.

Supplemental information

Email Larry Hedges for additional information: l-hedges@northwestern.edu.

Questions about this project?

To answer additional questions about this project or provide feedback, please contact the program officer.

 

Tags

Data and AssessmentsMathematics

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