Spearman Correlations of .60 Are Not Poor

Spearman correlations of .60 are not poor.

For many years, therapists have assumed a relationship between impairment and disability. More recently, researchers have begun to examine this assumption. "Motor Function and Activities of Daily Living Assessments: A Study of Three Tests for Persons With Hemiplegia" by Filiatrault, Arsenault, Dutil, and Bourbonnais (AjOT, September 1991, pp. 806-810) is a laudable example of such an examinatio...

How Many Quantum Correlations Are Not Local?

We study how generic is the property of nonlocality among the set of quantum correlations for bipartite dichotomic measurements. To do so, we consider the characterization of these quantum correlations as those of the form γ = (〈ui, vj〉)i,j=1, where the vectors ui and vj are in the unit sphere of a real Hilbert space. The important parameters in this description are the number of vectors n and ...

Charles Spearman

Few would dispute the claim that Charles Edward Spearman (1863-1945) is Britain’s premier psychologist and indeed one of the enduring figures in the history of behavioral science. Some twenty years ago, I asked a number of psychologists to list the names of whomever they considered to be the five or six most important persons in the history of psychological testing. Among all the nominations, o...

Within-woman hormone-attractiveness correlations are not simply byproducts of between-women hormone-attractiveness correlations

Havlicek et al. (Behavioral Ecology, 26, 1249-1260, 2015) proposed that increased attractiveness of women in hormonal states associated with high fertility is a byproduct (or “perceptual spandrel”) of adaptations related to between-women differences in sex hormones. A critical piece of their argument was the claim that between-women hormone-attractiveness correlations are stronger than correspo...

Prof. Spearman