backup materials and knowledge-base docs
This commit is contained in:
@@ -0,0 +1,57 @@
|
||||
# Strict Analysis Report
|
||||
|
||||
## Analysis Question
|
||||
- Compare Full Model, Frozen Encoder, and Subject Adapter on cross-subject decoding.
|
||||
- Determine whether the adapter closes the transfer gap without sacrificing stability.
|
||||
|
||||
## Data Inventory
|
||||
- 3 model families
|
||||
- 5 random seeds per family
|
||||
- subject-level WER and CER
|
||||
- training logs for convergence
|
||||
- ablation outputs for adapter width
|
||||
|
||||
## Executive Summary
|
||||
- Subject Adapter improves mean WER over Frozen Encoder by 3.8 absolute points.
|
||||
- The improvement is statistically significant under paired testing after multiple-comparison correction.
|
||||
- Full fine-tuning remains strongest overall, but Subject Adapter offers the best compute-performance tradeoff.
|
||||
- Performance variance is lower than Frozen Encoder, suggesting a more stable transfer path.
|
||||
|
||||
## Main Findings
|
||||
|
||||
### 1. Main comparison
|
||||
- Full fine-tuning: `31.4 ± 1.9` WER
|
||||
- Subject Adapter: `33.2 ± 1.3` WER
|
||||
- Frozen Encoder: `37.0 ± 2.1` WER
|
||||
|
||||
Observation:
|
||||
- Subject Adapter consistently outperforms Frozen Encoder across all 5 seeds.
|
||||
|
||||
Interpretation:
|
||||
- The transfer bottleneck is not purely feature reuse; a light adaptation head captures subject-specific alignment that freezing alone misses.
|
||||
|
||||
Implication:
|
||||
- Future work should prioritize adapter variants before investing in heavier full-model tuning.
|
||||
|
||||
### 2. Stability
|
||||
- Subject Adapter has the smallest seed variance among transfer-friendly methods.
|
||||
- Convergence curves show less oscillation after epoch 8.
|
||||
|
||||
Interpretation:
|
||||
- Adapter tuning is not only better on average, but easier to optimize.
|
||||
|
||||
### 3. Ablation
|
||||
- Reducing adapter width from 256 to 64 hurts WER by 1.6 points.
|
||||
- Increasing from 256 to 512 yields only marginal improvement.
|
||||
|
||||
Interpretation:
|
||||
- Most of the benefit is captured at moderate width; scale-up is not the current bottleneck.
|
||||
|
||||
## Caveats
|
||||
- Only 5 seeds; inference about tails remains limited.
|
||||
- Subject count is modest, so subject-level heterogeneity may still be under-estimated.
|
||||
- Training-time comparison depends on identical hardware assumptions.
|
||||
|
||||
## Recommended Next Move
|
||||
- Promote this finding into a `results-report` note focused on adapter vs freezing.
|
||||
- Run one robustness pass on held-out low-resource subjects.
|
||||
@@ -0,0 +1,33 @@
|
||||
# Figure Catalog
|
||||
|
||||
## Figure 1 — Main comparison
|
||||
- **Filename**: `figures/figure-01-main-comparison.pdf`
|
||||
- **Purpose**: Compare WER across Full fine-tuning, Subject Adapter, and Frozen Encoder.
|
||||
- **Data source**: `metrics/summary.csv`
|
||||
- **Plot type**: Bar + scatter overlay of seed-level points.
|
||||
- **Error bars**: 95% CI.
|
||||
- **Caption must include**:
|
||||
- metric direction,
|
||||
- number of seeds,
|
||||
- meaning of error bars,
|
||||
- whether significance markers are corrected.
|
||||
- **Key observation**: Subject Adapter closes most of the freezing gap.
|
||||
- **Interpretation checklist**:
|
||||
- Is the adapter improvement consistent across seeds?
|
||||
- Is the gap practically meaningful, not just statistically significant?
|
||||
- Does the figure support a design decision?
|
||||
|
||||
## Figure 2 — Convergence dynamics
|
||||
- **Filename**: `figures/figure-02-training-dynamics.pdf`
|
||||
- **Purpose**: Compare optimization stability over epochs.
|
||||
- **Data source**: `logs/train_curves.csv`
|
||||
- **Plot type**: Mean line + uncertainty ribbon.
|
||||
- **Caption must include**:
|
||||
- smoothing rule if any,
|
||||
- whether ribbon is std or CI,
|
||||
- training/eval split.
|
||||
- **Key observation**: Frozen Encoder shows larger oscillation after epoch 8.
|
||||
- **Interpretation checklist**:
|
||||
- Is instability transient or persistent?
|
||||
- Does curve shape match final metric variance?
|
||||
- Does this explain why one method is harder to tune?
|
||||
@@ -0,0 +1,36 @@
|
||||
# Statistical Appendix
|
||||
|
||||
## Primary Metric
|
||||
- Word Error Rate (WER), lower is better.
|
||||
|
||||
## Sample Structure
|
||||
- Unit of analysis: seed-level run, paired by shared data split and subject pool.
|
||||
- Number of seeds per condition: 5.
|
||||
|
||||
## Descriptive Statistics
|
||||
|
||||
| Condition | Mean WER | Std | 95% CI |
|
||||
|---|---:|---:|---:|
|
||||
| Full fine-tuning | 31.4 | 1.9 | [29.8, 33.0] |
|
||||
| Subject Adapter | 33.2 | 1.3 | [32.1, 34.3] |
|
||||
| Frozen Encoder | 37.0 | 2.1 | [35.1, 38.9] |
|
||||
|
||||
## Assumption Checks
|
||||
- Shapiro-Wilk on paired differences: `p = 0.19`
|
||||
- No strong evidence against normality for the primary contrast.
|
||||
- Given small n, interpretation remains conservative.
|
||||
|
||||
## Inferential Tests
|
||||
|
||||
| Contrast | Test | Statistic | p | Effect size | Correction |
|
||||
|---|---|---|---:|---:|---|
|
||||
| Subject Adapter vs Frozen Encoder | paired t-test | `t(4) = -4.11` | 0.014 | Cohen's `d = 1.84` | Holm |
|
||||
| Full fine-tuning vs Subject Adapter | paired t-test | `t(4) = -2.03` | 0.112 | Cohen's `d = 0.91` | Holm |
|
||||
|
||||
## Interpretation Guardrails
|
||||
- First contrast is supported after correction.
|
||||
- Second contrast trends in favor of full fine-tuning but is not conclusive at this sample size.
|
||||
|
||||
## Blockers / Limits
|
||||
- No subject-level bootstrap yet.
|
||||
- No calibration analysis available.
|
||||
Reference in New Issue
Block a user