WHAT MEDIATES INFANTS AND ADULTS SUPERIOR PROCESSING OF THE MAJOR OVER THE AUGMENTED TRIAD

In this paper, the claim that the major triad has special status for i nfant as well as adult listeners is evaluated. In Experiment 1, infant s and adults were required to detect a downward semitone change in a f ive-note melody based on the major triad and in another five-note melo dy based on the augmented triad. Both infants and adults performed sig nificantly better on the major triad melody. In Experiment 2, infants and adults were evaluated on their detection of a downward semitone ch ange in a five-note melody that incorporated a perfect fifth or augmen ted fifth relation but that also contained non-Western intervals. Agai n, infants and adults performed significantly better on the melody tha t incorporated the perfect fifth relation. These findings imply that e nhanced processing of perfect fifth relations may account for infants' and adults' effective processing of the major triad.