Aji, S. K., Endang Rini Sukamti and Tomoliyus Tomoliyus (2025) “Survey Of Anxiety And Self-Confidence Levels Of Badminton Athletes Before Competing In The Riau Kejurpov Championship: Anxiety and self-confidence or psychology”, International Journal Of Humanities Education and Social Sciences (IJHESS) , 4(4). doi: 10.55227/ijhess.v4i4.1397.