Apparently, such prejudices can affect classroom achievement as well. In a study conducted by Herbert Harari of San Diego State University, and John McDavid of Georgia State University, teachers gave consistently lower grades on essays apparently written by boys named Elmer and Hubert than they awarded to the same papers when the writers' names were given as Michael and David. However, teacher prejudice isn't the only source of classroom difference. Dr. Thomas V. Busse and Louisa Seraydarian of Temple University found those girls with names such as Linda, Diane, Barbara, Carol, and Cindy performed better on objectively graded IQ and achievement tests than did girls with less appealing names.