Makes sense: a scrollbar is super common and isn't something you interact with directly that often because there are alternatives (swiping, or on a pc the scrol

Makes sense: a scrollbar is super common and isn't something you interact with directly that often because there are alternatives (swiping, or on a pc the scroll wheel, up/down, pg up/down). But most other controls don't have that many alternatives and/or don't nearly always appear in the same position so then some actual visual recognition is needed. Of which the results are described in this and other papers.