Abstract
Language and music, two of the most unique human cognitive abilities,
are combined in song, rendering it an ecological model for comparing
speech and music cognition. The present study was designed to determine
whether words and melodies in song are processed interactively or
independently, and to examine the influence of attention on the processing
of words and melodies in song. Event-Related brain Potentials (ERPs)
and behavioral data were recorded while non-musicians listened to
pairs of sung words (prime and target) presented in four experimental
conditions: same word, same melody; same word, different melody;
different word, same melody; different word, different melody. Participants
were asked to attend to either the words or the melody, and to perform
a same/different task. In both attentional tasks, different word
targets elicited an N400 component, as predicted based on previous
results. Most interestingly, different melodies (sung with the same
word) elicited an N400 component followed by a late positive component.
Finally, ERP and behavioral data converged in showing interactions
between the linguistic and melodic dimensions of sung words. The
finding that the N400 effect, a well-established marker of semantic
processing, was modulated by musical melody in song suggests that
variations in musical features affect word processing in sung language.
Implications of the interactions between words and melody are discussed
in light of evidence for shared neural processing resources between
the phonological/semantic aspects of language and the melodic/harmonic
aspects of music.
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