In the gingko biloba experiment, the participants in both the experimental group and the placebo control group improved on the cognitive tests because of a practice effect.
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Q230: In a research study, subtle cues or
Q231: Any change in performance that results from
Q232: Experimental controls are specific strategies and procedures
Q233: In a double-blind study, neither the researcher
Q234: The placebo effect is also called the
Q236: The effects of a placebo are compared
Q237: Expectancy effects are the same things as
Q238: In a double-blind experiment, participants are both
Q239: The placebo control group is a control
Q240: The experimental group (or experimental condition) is
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