Reliability of the NACC Telephone‐administered Neuropsychological Battery (T‐cog) and Montreal Cognitive Assessment for participants in the USC ADRC
Bibliographic record
Abstract
Abstract Introduction Restrictions during the COVID‐19 pandemic necessitated remote administration of neuropsychological testing. We assessed the test–retest reliability for a telephone‐administered cognitive battery, recommended for use in the National Institute on Aging Alzheimer's Disease Research Center (ADRC). Methods 64 participants in the University of Southern California ADRC clinical core underwent repeat telephone evaluation using the T‐cog Neuropsychological Battery. Reliability was measured by intraclass correlation coefficient (ICC) for continuous variables and weighted Kappa coefficient for categorical variables. Mean scores for Montreal Cognitive Assessment (MoCA) total and Craft Story 21 Immediate and Delayed Recall were compared using paired t tests. Results Mean age was 74.8 (8.3 standard deviation); 73.4% were female. ICCs ranged from 0.52 to 0.84, indicating moderate test–retest reliability except for number span backward, which showed poor reliability. Weighted Kappa for MoCA items ranged from −0.016 to 0.734; however, relatively good observed agreement was seen across all items (70.3% to 98.4%). Although MoCA total scores did not significantly change, Craft Story 21 Immediate and Delayed Recall mean scores increased between first and second administrations (P < 0.0001). Discussion Test–retest reliability for the T‐cog Neuropsychological Battery is adequate. The variation seen in testing is similar to results seen from face‐to‐face testing, with Craft Story 21 recall showing modest and expected practice effects. Highlights Moderate test–retest reliability is seen in most measures of the National Alzheimer's Coordinating Center Neuropsychological Test Battery and the Montreal Cognitive Assessment (MoCA). Intraclass correlation coefficients ranged from 0.52 to 0.84, except for number Span backward. Weighted Kappa for MoCA items varied, but good observed agreement was seen. MoCA total mean score did not change significantly between administrations. Craft Story 21 Immediate and Delayed Recall means increased on repeat testing (P < 0.0001).
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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 | 0.010 | 0.028 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".