Answer:
Randomized Control Trial (RCT)
Explanation:
A Randomized Control Trial (RCT) study is a type of scientific study method, especially used in medical studies, where the subjects of the study are randomly assigned to two groups (Test and control groups). The test groups receive a medical intervention whose effect is to be studied, while the control group receives a placebo (a substance that is inert and has no therapeutic value). Notably in this study design is that apart from the medical intervention of interest, every other variable such as age, sex, race, etc. is controlled (the same across all the groups), to reduce the occurrence of biases, and this is to ensure that the difference in the outcomes between the test and control groups are as a result of the variable of interest alone. Randomization is also critical because it helps reduce recruitment bias and mimics natural occurrence as much as possible.
The type of experimental design used in this study is; Completely randomized design
We are told that the sample size is 100 volunteers that suffer chronic pain.
Now, out of the 100, 50 males and 50 females are chosen.
Out of the 50 males, 25 are randomly assigned to the treatment group while the other 25 are assigned to a control group.
Since the treatments are randomly assigned completely, each of the volunteers have an equal chance of receiving the treatments.
Read more about randomized design at; https://brainly.com/question/9363521
