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Reasoning about and interpreting effect sizes: How big are they, really?
Half a century ago, educational psychologist Gene Glass coined a term for research synthesis, meta-analysis: “the term is a bit grand, but it is precise” (Glass, 1976, p. 3). Glass and Mary Lee Smith had wondered how to combine different studies about the effectiveness of behavioral and talk therapy, and decided that one way to […]
Witch hunt for words
Note: this first appeared as a column in the Arizona Daily Star (Tucson) January 8, 2026. When the Arizona Board of Education voted December 8 to remove anything smacking of “diversity, equity, and inclusion” from our Structured English Immersion curriculum and the Arizona Professional Teaching Standards, they were succumbing to this year’s witchhunt for words. […]