Letter Cancellation Performance Across the Adult Life Span
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Letter cancellation tasks are paper and pencil tests widely used in clinical and research settings as quick measures of attention/concentration, visual-spatial scanning abilities, and visual-spatial dysfunctions such as spatial neglect. Despite their popularity, only a few studies have investigated effects of age on letter cancellation performance and no comprehensive large-scale adult life-span norms are available for any of the letter cancellation tasks. We have developed a letter cancellation test, and we report a normative data obtained from a partially stratified sample of 351 healthy adults between 18 and 91 years of age. The results show the expected large age-related decline in the speed of letter cancellation performance and no age-related differences in spatial distribution of cancellation errors. We also provide various equations for precise predictions of Cancel H test performance. The results of correlational analyses show high reliability and provide evidence for both convergent and divergent validity of our letter cancellation task.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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