Martin wants to know how often restaurant employees wash their hands. He is concerned about the Hawthorne effect. Which research method could Martin use to make sure the Hawthorne effect does not influence his findings?

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The Answer of Martin wants to know how often restaurant employees wash their hands. He is concerned about the Hawthorne effect. Which research method could Martin use to make sure the Hawthorne effect does not influence his findings?

Martin Wants to Know How Often Restaurant Employees Wash Their