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My interests crystallized while I was completing my
doctorate. In addition to the core counseling courses, I took
an equal number of classes in educational research and
scientific techniques. I began programming computers and
investigating how the choice of a research method affected
the conclusions drawn from data. I have maintained my
interest in counseling, but I focus more on research methods
used to answer questions about counseling.
Since coming to Minnesota, I have developed a strong
interest in computer simulations. Such simulations can be
used to investigate questions in statistics and to model
counseling behavior. One study using a computer simulation to
investigate a statistical technique resulted in the article,
"Empirical comparison of univariate and multivariate
analysis of variance procedures," (Hummel & Sligo,
1971). This study was designated a "citation
classic" by the Social Science Citation Index (this
requires a minimum of 100 citations).
More recently, a number of years of my work have been summarized in a
chapter entitled, "The usefulness of tests in clinical decisions"
(Lichtenberg & Goodyear, 1999). The chapter presents equations useful in
testing clinical hypotheses and presents numerical analysis results on
critical values for testing clinical hypotheses, as well as by the long run
probabilities associated with their use. For this work, I received the
American Educational Research Association, Division E, Distinguished
Research Award.
Selected publications
Hummel, T. J. (1999). "The usefulness of tests in clinical
decisions." In J. W. Lichtenberg & R. K. Goodyear.
Scientist-Practitioner Perspectives on Test
Interpretation,
59-112. Boston: Allyn & Bacon.
Hummel, T. J., & Sligo, J. (1971). "An empirical
comparison of univariate and multivariate analysis of
variance procedures." Psychological Bulletin, 76(1),
49-57.
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