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Bimodal distribution of performance in discriminating major/minor modes

C. Chubb, C. A. Dickson, T. Dean, C. Fagan, D. S. Mann, C. E. Wright, M. Guan, A. E. Silva, P. K. Gregersen and E. Kowalsky This study investigated the abilities of listeners to classify various sorts of musical stimuli as major vs minor. All stimuli combined four pure tones: low and high tonics (G5 and G6), dominant (D), and either a major third (B) or a minor third (B♭). Especially interesting results were obtained using tone-scrambles, randomly ordered sequences of pure tones presented at ≈15 per second. All tone-scrambles tested comprised 16 G's (G5's + G6's), 8 D's, and either 8 B's or 8 B♭'s. The distribution of proportion correct across 275 listeners tested over the course of three experiments was strikingly bimodal, with one mode very close to chance performance, and the other very close to perfect performance. Testing with tone-scrambles thus sorts listeners fairly cleanly into two subpopulations. Listeners in subpopulation 1 are sufficiently sensitive to major vs minor to classify tone-scrambles nearly perfectly; listeners in subpopulation 2 (comprising roughly 70% of the population) have very little sensitivity to major vs minor. Skill in classifying major vs minor tone-scrambles shows a modest correlation of around 0.5 with years of musical training. DOI: 10.1121/1.4816546

Citation

Chubb, C., Dickson, C. A., Dean, T., Fagan, C., Mann, D. S., Wright, C. E., Guan, M., Silva, A. E., Gregersen, P. K., & Kowalsky, E. (2013). Bimodal distribution of performance in discriminating major/minor modes. The Journal of the Acoustical Society of America, 134, 3067–3078.

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BibTeX

@article{chubb2013bimodal,
  title     = {Bimodal distribution of performance in discriminating major/minor modes},
  author    = {Chubb, C. and Dickson, C. A. and Dean, T. and Fagan, C. and Mann, D. S. and Wright, C. E. and Guan, M. and Silva, A. E. and Gregersen, P. K. and Kowalsky, E.},
  journal   = {The Journal of the Acoustical Society of America},
  year      = {2013},
  volume    = {134},
  pages     = {3067--3078},
  doi       = {10.1121/1.4816546},
}