Hello everyone,

I have a question about different types of EDA electrodes and their correct placement.

Currently, we are using the Shimmer GSR+ unit with velcro strap electrodes (https://www.shimmersensing.com/product/shimmer3-gsr-unit/). The standard recommendation is to place the velcro straps at the base of the index and middle fingers where they meet the palm. Since rubbing the straps against each other can cause motion artifacts in the data (which can happen quickly due to the thickness of the velcro straps) and I suggest that disposable adhesive electrodes ensure safer contact with the skin, I consider switching to disposable adhesive electrodes. Does anyone have experience with these types of electrodes and their (dis-)advantages?

I've also come across suggestions to place the electrodes on the index and ring fingers instead of the index and middle fingers. This alternative placement would prevent the velcro straps from rubbing against each other. However, I am wondering if this alternative placement is valid?

More generally, I'd be grateful for any advice on the optimal placement of EDA electrodes on the hand. Beyond placing the electrodes at the base of the index and middle fingers where they meet the palm, I've heard of options such as the thenar and hypothenar eminences (the palm's base below the thumb and pinky) and across the distal phalanges of the index and middle fingers. In particular, I am searching for the optimal placement that maximizes signal quality. In my experiment, participants are asked to keep their hand equipped with the electrodes still, so they do not be able to use the that hand.

Thanks in advance for your feedback and for sharing your experience!

Best regards

Nina