The correct answer is: "Over the years, about 45 percent of the students in Dr. Hunt's introductory psychology course have correctly predicted their major, but their confidence in this prediction has been about 75 percent on average."
Overconfidence is a type of bias occurring when a person makes a judgement based on a very high level of subjective confidence on the validity of such judgement. The level of confidence showed by the subject is actually greatar that its objective accuracy.
Overconfidence is manifested in three different ways: