A psychologist studies the influence of laughter on academic success. Fifty students study for an hour each day. Twenty-five of them have a timer and are told to laugh every fifteen minutes. The other group simply studies. They all take a test and the psychologist compares their test scores. In this study: Laughter is the independent variable and academic success is the dependent varlable. AcademicC success is the Independent variable and lauhter is Uhe decendent variable Laughter Is a confound. Academic success is a confound.

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