The psychological effects of surgery appear to be one factor.
手术带来的心理因素似乎是一个主要因素。
2
To me, the determining factor is psychological - the consistent winners think differently from everyone else.
对我来说，决定因素是心理上的——持续一致的赢家和别人想的不一样。
3
I think it's more of a psychological feel-good factor - Since you are up before 99.99% of the world, you want to maintain the lead, so that spurs you on to work fast.