Some Research Problems Encountered at the Educational Testing Service

Howard Wainer, Eugene G. Johnson, Charles Lewis, and Robert J. Mislevy

Abstract:
The Educational Testing Service is the largest private testing organization in the world. In the course of fulfilling its mission many perplexing statistical problems are encountered. In this article each of four ETS statisticians describe a problem that currently engages their attention.

Keywords:
Nonignorable nonresponse; Bayesian estimation; choice; missing data; Hilbert.