These tests would include a few groups of people. The first test would have two groups. The first group would be the control group. The second group would listen to a silent subliminal that trains them to be right and left handed. After one week, we compare what happened to the control group (not listening) and the group who did listening and noted any changes. Then we would check back on the after a month. The official test would be over then and they would be able to continue listening or stop if they choose.
The second test would be for growth in men and women. The first groups would be the control group. Breast sizes and penis length/girth would be recorded and they wouldn't listen. The second group would also have their parts recorded. The second groups would listen to silent subliminals that cause either their breasts or penis to grow. After a week results would be recorded and then after a month they would be recorded again. They would be able to choose to keep listening if they wanted.
I believe these tests would allow us to have a better understanding of if/how silent subliminals work.