FTA > Also, while most students (67 per cent) actually failed to study in a way consistent with their supposedly preferred learning style, those who did study

FTA > Also, while most students (67 per cent) actually failed to study in a way consistent with their supposedly preferred learning style, those who did study in line with their dominant style did not achieve a better grade in their anatomy class than those who didn’t. Isn't this self-selection? Introducing sampling bias?