title: Matching, the null hypothesis and the aging variable: would the real age effect please stand up.
abstract: The concepts of hypothesis testing and maching are discussed in terms of their relationship to the findings of no age differences and sample bias, respectively. Suggestions are also offered concerned statistical substitutes for more rigid experimental controls.
mesh_terms: D000375:Aging; D000704:Analysis of Variance; D006801:Humans; D011581:Psychological Tests; D012107:Research Design