“I also want to add the position of the sensors or buttons may also be considered. Take a look the button pad video. I uploaded it to GD as well. After looking at the heart glove video several times, I noticed her moving her thumb a little more. It seems to me her main motion is more of moving the thumb beside the index finger. Similar to making the thumb touch the side of the index finger. It may be a good idea to maybe place a sensor or button right in the area in between the thumb and index finger. I am referring to the lower area of skin. Take a look at the picture below.
It may be good to have something sit between the thumb and index finger as a trigger. It may also protrude a little so she will notice the movement. But these are just a few thoughts.”