There is a famous one in psychology Valenda effect ,Valenda is a famous American high wire walkers ,
In a major performance unfortunately, he lost his footing and died.his wife said afterwards i know this time something must happen ,because before he went on the court always talking it's so important this time ,can not fail never fail .and every successful perfromance before he just wanted to walk the tightrope the matter itself ,instead of taking care of it everthing that could come.
Laster psychologists put this to achieve an end and focus too much on the results ,always thinking about gain and loss it's called the valencia mentality.
Stanford University one study also showed that a certain image in human brain it will be like the actual situation stimulating the nervous system ,this is the law of things,if you focus too much on success or failure ,results often fail .as long as you focus on things it's own characteristics and rules focus on it ,you will receive it unexpected effect
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