Social Studies, 03.08.2019 04:20 salutemeimchloe
Paul solomon and his colleagues investigated the effects of the herb ginkgo biloba on memory, concentration, and other mental tasks. all participants in the study took a battery of cognitive tests at the beginning and end of the six-week study. the results showed that the test scores increased about the same for the participants in the experimental group as for the participants in the placebo control group. how is this best explained?
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Paul solomon and his colleagues investigated the effects of the herb ginkgo biloba on memory, concen...
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