acting superstitiously for good luck.
for me it’s white shoes.
It had the effect of supporting the experiment.
https://www.weblio.jp/content/%E9%A8%93%E3%82%92%E6%8B%85%E3%81%90
https://bookplus.nikkei.com/atcl/column/041700233/041700002/
https://ameblo.jp/hirots2525kun/entry-12838558772.html