What are the different expectation effects behind the placebo response?

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  1. Dr. Michael T Murray
     
    Dr. Michael T Murray answered:
    • Hawthorne effect: Subjects respond to knowledge of being evaluated and observed.
    • Jastrow effect: Subjects respond to explicit expectation about outcome.
    • Pygmalion effect: Evaluators expect therapeutic benefit, so they see it.
    • John Henry effect: Control subjects attempt to emulate expected outcomes.
    • Halo effect: Subjects respond to novelty of treatment (i.e., new technology).
    • Experiment effect: Evaluators consciously (or not) interpret outcomes differently.
    • Socialization effect: Others reporting benefit influence outcomes.
    • Value effect: Price of treatment influences expected outcomes.
    More Related Answers from Dr. Michael T Murray
    Hawthorne effect: Subjects respond to knowledge of being evaluated and observed. Jastrow effect: Subjects respond to explicit expectation about outcome. Pygmalion effect: Evaluators expect therapeutic benefit, so they see it. John Henry effect:... More