Before making a decision, if the value of each thing is roughly similar in the minds of decision makers, it is difficult to determine its advantages and disadvantages. However, after making a choice, the decision-makers' attitude and evaluation of these things have changed. This phenomenon is called post decision effect.
According to the above definition, which of the followings is a post decision effect?
A teacher hesitated to choose A or B to participate in the competition. The monitor suggested choosing B. Afterwards, the teacher thought that choosing B was completely correct, because B finally won the championship.