Bibliographic record
Abstract
Absolute pitch (AP) enables its possessors to identify musical notes and keys by qualities of tone height and tone chroma. With advancing age, an unknown proportion of AP possessors perceives changes in these qualities, usually described as in the sharp direction and to the extent of a semitone or tone. The phenomenon is identified here as absolute pitch shift (APS). Using a cellphone-based tone generator, the writer conducted an N = 1 examination of the APS in his central musical range. The shift was greater at the centre of the range than at its extremes, causing him to perceive incoming tones as 1 to 4 semitones sharper than his recall of them in the A = 440 cps (concert pitch range). The report focusses on the comparative flatness of his AP memories of the tones, expressed with greater precision in cycles per second than by the names commonly given to their physical versions. The altered pitch perceptions are considered due to changes at the basilar membrane level in older individuals, and are labelled here as basilar AP. The internal pitch template’s role in memorising tone frequencies in the inner ear is labelled cortical AP. Implications are considered for further studies of AP and APS latency.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.020 | 0.005 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".