A psychologist has developed a procedure for modifying behavior so that subjects suffering from depression can greatly

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A psychologist has developed a procedure for modifying behavior so that subjects suffering from depression can greatly improve that condition. In formal tests of the effectiveness of the treatment, what is an experimenter effect, and how might it be avoided?
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Statistical Reasoning for Everyday Life

ISBN: 978-0321817624

4th edition

Authors: Jeff Bennett, Bill Briggs, Mario F. Triola

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