[4rgento]

This illustrates the way I see the "thing" with expectations: "They come from previos experience(including research as previos experience)". The Zen's mind, begginers' mind books suggets to keep your mind open to all outcomes, despite your experience (easier say than done, however).

It's hard(at least for me) to control expectations (I have evidence[bayes] that supports those expectations). In the other side, the outcome, is what actualy happened so you should add it to your evidence and update your prior beliefs for the next time.

TL;DR avoid expectation (not the real point); accept the outcome and update your experience (could be a better aproach)