Name initials may influence grades: study

The effect was the same in a study of the grade point averages of 15,000 graduate students over a 15-year period.

"Cs and Ds do reliably worse than everyone else," said Nelson.

"All the students are working very hard to succeed as much as possible, it just happens to be that if you find failure less aversive than someone else, you'll fail slightly more often," he added.

The researchers said their findings are in line with the name-letter effect, in which a person's favorite letter is often one of their initials. The favored initial may influence life outcomes, such the city a person lives in or the choice of occupation.

Nelson said the study demonstrates the power of the unconscious mind in controlling behavior in certain situations.

"Certainly, my wife made sure we didn't name our daughter with a C or a D after reading the paper," Nelson said.