PROCEDURES FOR OBTAINING SEPARATE SET AND CONTENT COMPONENTS OF A TEST SCORE1Helmstadter, Gerald C. · ETS Research Bulletin Series · 1956

USING AND INTERPRETINGAllison, Roger B.; Helmstadter, Gerald C. · ETS Research Bulletin Series · 1955

Communicating test information in a test manual.Allison, Roger B., Jr.; Helmstadter, Gerald C. · Journal of Counseling Psychology · 1956

Usefulness of Test Items That Involve Finding a Pattern in Data: A ReplyGerald C. Helmstadter · The Scientific Monthly · 1955

PROCEDURES FOR OBTAINING SEPARATE SET AND CONTENT COMPONENTS OF A TEST SCORE1Helmstadter, Gerald C. · ETS Research Bulletin Series · 1956

A Comparison of Two Methods for Determining Difficulty in a Multiple Choice TestHawes, Margery V.; Helmstadter, Gerald C. · The Journal of Educational Research · 1963

A Comparison of Two Methods for Determining Difficulty in a Multiple Choice TestMargery V. Hawes and Gerald C. Helmstadter · The Journal of Educational Research · 1963

A CAUSAL MODEL OF MATHEMATICS PERFORMANCE IN EARLY ADOLESCENCE: THE ROLE OF SEXMIDKIFF, ROBERT M.; BURKE, JOY PATRICIA; HELMSTADTER, GERALD C. · Psychological Reports · 1989