Psychoacoustic Similarity Judgments in Expert Rappers and Laypersons.

This study sought to determine whether rap expertise is associated with enhanced knowledge of psychoacoustic similarity. Using a stimulus composed of pseudo-word assonantal half-rhyme triplets (e.g., freet/speet//yeek), expert improvisational rap lyricists were compared to laypersons (non-lyricists) in their judgments of half-rhyme acceptability. According to both a perception-based and a linguistic feature-based measure of psychoacoustic similarity, lyricists were distinct from non-lyricists in the rates at which they found half-rhymes acceptable, and in how group responses were correlated with the similarity measures. Data indicate that, compared to non-lyricists, lyricists' half-rhyme acceptance rates are more highly correlated with linguistic features that have more robust perceptual cues. Evidence suggests that lyricists and non-lyricists employ different strategies for determining the acceptability of half-rhymes, and that lyricists might be more sensitive or attuned to similar aspects of speech sounds.