PLEASE HURRY WORTH 24 PIONTS What can create biases in people, sometimes that we are unaware of? Well thought out and logical ideas, backed by science research and evidence

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In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.