Is Occam’s Razor Meaningful for Selecting Significant Outcome Items and to Narrow Down Question Numbers in a Psychometric Scale?
Bibliographic record
Abstract
Assessment of interventional results based on patient-reported outcomes brings greater understanding of patients’ value judgments of therapeutic effectiveness, and in turn requires development of accurate psychometric instruments1. Though patient-reported outcome measures are very important for clinical practice, we cannot measure the function or disability of patients directly. It is absolutely important, therefore, to obtain the information on functional status, health-related quality of life (HRQOL), and other related data such as patients’ values and perceptions, through valid and reliable psychological assessments2. How can we measure a patient’s health condition? “Measuring health” or “measuring disease” are necessary steps in outcome research. A patient-centered questionnaire is a widely used method to collect necessary information from subjects with a targeted condition. It is a core procedure to measure HRQOL with such an assessment. And it is essential to assess the difference in the patient’s condition before and after medical intervention, to determine its effectiveness. This is the key reason we must understand the psychometric principles. Parkes and colleagues, in this issue of The Journal, discuss the sensitivity to change of pain measures in knee osteoarthritis (OA)3. They conducted a comparative study to investigate the increased sensitivity to change of combining outcomes compared to single measures of pain3. They have previously published an article focused on the same topic4. How can we manage the number and content of outcome items to sharpen our measuring aim? When applying a psychometric scale to a certain condition, the process of selecting outcome items for research is a very important and interesting topic. A comprehensive approach means many items could cover a wide range of conceptual constructs, but the weakness is in the feasibility, or the statistical handling needed to … Address correspondence to Dr. M. Akai, Graduate School, International University of Health and Welfare, 4-1-26 Akasaka, Minato-ku, Tokyo 107-8402, Japan. E-mail: akai-masami{at}iuhw.ac.jp
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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 | 0.267 | 0.599 |
| Meta-epidemiology (narrow) | 0.003 | 0.002 |
| Meta-epidemiology (broad) | 0.006 | 0.004 |
| Bibliometrics | 0.011 | 0.010 |
| Science and technology studies | 0.006 | 0.033 |
| Scholarly communication | 0.011 | 0.027 |
| Open science | 0.007 | 0.008 |
| Research integrity | 0.012 | 0.020 |
| Insufficient payload (model declined to judge) | 0.008 | 0.006 |
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".