Kinetic Analysis of Hip Motion During Piano Playing
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Bibliographic record
Abstract
The swaying action coming from the pianists' hip region constitutes the pivotal point for upper body movements. In this paper, we evaluate the relation between the use of vertical force and structural characteristics of technically different excerpts when pianists play with varied levels of expression. We also analyze the common patterns within the time-series of force data. Ten pianists performed three excerpts from the Romantic period in four expressive conditions. The force was measured with a Bertec force plate placed under the piano stool. The rhythmic and dynamic form, and the technical complexity of the excerpt, induce variations in force when pianists play with different levels of expression. Recurrent patterns of hip motion are found in specific regions of the score, which suggests that these pianists share similar movement strategies to communicate structural features.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it