Baymard (https://baymard.com/blog https://baymard.com/blog) and Nielsen Norman Group (https://www.nngroup.com/articles/ https://www.nngroup.com/articles/) might

Baymard (https://baymard.com/blog https://baymard.com/blog) and Nielsen Norman Group (https://www.nngroup.com/articles/ https://www.nngroup.com/articles/) might have the kind of research that you are looking for.