After designing an estimator aiming to predict attention state from EEG, it has been thought to implement it in a neurofeedback in virtual reality.
However, due to the covid related issues, it is very difficult to plan a big study with a large number of participants (as often the case in related research projects). I was wondering if it could be interesting to consider a study (or pre-study) with a small number of participants?
Hi,
This particular pdf will be of help to you.
Pilot Study Sample Size Rules of Thumb
📷ncss-wpengine.netdna-ssl.com › pdf › Procedures › PASS
Hi Victor,
I would say at minimum, to find any reasonable effect you would need minimum 6 participants if it is a single arm with no control. Or 12 if you include 6 controls. More would certainly be better, but if you are looking for a minimum I think this would be it. Moreover, are you looking for an effect such as change in EEG, or behaviour/symptoms, or both? For this you will also have to consider the number of sessions that are required to see an effect.
Best,
DMB
Hi Victor!
I think the number of patients depends on what you want to demonstrate. If you are looking for a preliminary study, with few patients you can sense the magnitude of the effect of your intervention. After this preliminary study, you can calculate better the number of patients you need to robustly demonstrate an effect of neurofeedback.
Moreover, you must keep in mind the statistical analysis is different if you have few or more patients.
Best regards,
Jorge de Francisco
Thanks to all your answers, it will really help me to have a better view of the plan for the future. I wish you the best for your research projects.
Best regards,
Victor
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