Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group (no relaxation training) or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. the independent variable in this study is

11. what characteristic was shared by all the important scientists of the scientific revolution? the importance of challenging authority at all times in the pursuit of truth. truth is only achievable through a process of inquiry and observation. the belief that traditional methods of inquiry and discovery were correct, but needed greater accuracy. the belief that the ancient philosophers were correct in their original observations of the laws of nature.