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the null hypothesis in the life sciences is almost always false—if taken literally— in designs that involve any sort of self-selection or correlation… - Paul E. Meehl
" "the null hypothesis in the life sciences is almost always false—if taken literally— in designs that involve any sort of self-selection or correlations found in the organisms as they come, that is, where perfect randomization of treatments by the experimenter does not exhaust the manipulations. Hence even “experimental” (rather than statistical or file data) research will exhibit this if interaction effects involving attributes of the persons are studied. Consequently, whether or not the null hypothesis is rejected is simply and solely a function of statistical power.
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About Paul E. Meehl
Paul Everett Meehl (3 January 1920—14 February 2003) was an American psychology professor. Known for his work on the Minnesota Multiphasic Personality Inventory, statistical vs. clinical prediction, and philosophy of science.
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Paul Everett Meehl
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Additional quotes by Paul E. Meehl
Most so-called “theories” in the soft areas of psychology (clinical, counseling, social, personality, community, and school psychology) are scientifically unimpressive and technologically worthless. [...] Most of them suffer the fate that General MacArthur ascribed to old generals—They never die, they just slowly fade away.
A zealous and clever investigator ... undismayed by logic-of-science considerations and relying blissfully on the "exactitude" of modern statistical hypothesis-testing, has produced a long publication list and been promoted to a full professorship. In terms of his contribution to the enduring body of psychological knowledge, he has done hardly anything. His true position is that of a potent-but-sterile intellectual rake, who leaves in his merry path a long train of ravished maidens but no viable scientific offspring.
a fairly widespread tendency to report experimental findings with a liberal use of ad hoc explanations for those that didn't "pan out." ... especially tempting in the "soft" fields of (personality and social) psychology, where the profession highly rewards a kind of "cuteness" or "cleverness" in experimental design, such as a hitherto untried method for inducing a desired emotional state, or a particularly "subtle" gimmick for detecting its influence upon behavioral output.
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