LLM debate assessment · research review

Supervisor feedback & candidate-orientation analysis

A review of the shared ChatGPT recommendations against the current full manuscript, followed by a reproducible explanation of the A/B-to-D/R correlation changes.

28 October 2026 · Latest compiled manuscript: 48 pages · Analysis only; manuscript unchanged

The main conclusion

The observed correlation changes are fully reproduced by recoding eight of the same 21 debates. No new LLM scores are needed to produce this change. That establishes the mathematical mechanism—not the cause of the models’ original preferences.

21 / 21Same debates and saved scores
8Both margins reversed; 13 unchanged
78 ↓ / 30 ↑Changes in |r| across 108 comparisons
108 / 108Candidate-leader match counts unchanged
A correction to the wording about p-values. For these fixed-N Pearson tests, smaller |r| means a larger p-value. All 32 Debatrix rubric correlations weakened; their p-values rose. Across the other tasks, changes went in both directions. A larger |r| may also mean a stronger negative association, not better performance.

01 · What has been implemented?

The source contains the supervisor’s own prompts and ChatGPT’s recommendations. The direct request was to merge objectives/questions into three or four; the human benchmark and controlled order/identity tests were proposed extensions. The statuses below do not turn every recommendation into a mandatory supervisor instruction.

11Implemented in the current scope
6Partly implemented / follow-up
3Not implemented, including optional items
—No artificial quality or readiness score

How the five original questions became the current three

Shared-chat proposal
  1. RQ1: criterion alignment across models and rubric dimensions (old RQ1 + RQ2).
  2. RQ2: compare assessment tasks (old RQ3).
  3. RQ3: sensitivity and repetition (old RQ4 + RQ5).
Current manuscript
  1. RQ1: Debatrix whole / paired-turn + LLM-POTUS comparisons. Claim tasks in supplements.
  2. RQ2: added value of an ensemble under nested LOGO-CV / LOOCV.
  3. RQ3a: sensitivity; RQ3b: repeated scoring.

The three-question count is satisfied. The ensemble-centered RQ2 is a later scope choice, not a verbatim implementation of the shared-chat RQ2.

02 · All tasks, not just Debatrix

The comparison contains 108 series: 16 whole-debate + 16 paired-turn + 12 supplementary/mean measures + 64 detailed audience measures. Each correlation uses the same 21 debates. “Weaker” and “stronger” below refer to |r|, not to scientific validity or model quality.

TaskN|r| ↓|r| ↑p < 0.05
A/B → D/R
Lost / gained
Debatrix · whole debate1616016 → 88 / 0
Debatrix · paired turn1616016 → 88 / 0
ClaimBuster-based4220 → 00 / 0
PROClaim-based4040 → 10 / 1
LLM-POTUS · audience mean4040 → 10 / 1
LLM-POTUS · audience detail64442018 → 1312 / 7

Nominal, two-sided Pearson p-values, not BH-adjusted q-values. Of 108 tests, 28 cross from p < 0.05 to p ≥ 0.05; 9 cross in the other direction. These correlated tests are a descriptive inventory, not 108 independent replications.

Debatrix Overall: r with p beside it

Procedure / judgeOriginal A/B: r (p)D/R: r (p)Same candidate as poll
Debatrix · whole debate
GPT-OSS 20B
0.728 (0.000183)0.609 (0.0034)16/21 → 16/21
Debatrix · paired turn
GPT-OSS 20B
0.637 (0.0019)0.461 (0.0355)16/21 → 16/21
Debatrix · whole debate
DeepSeek-R1 32B
0.601 (0.0040)0.366 (0.1029)16/21 → 16/21
Debatrix · paired turn
DeepSeek-R1 32B
0.660 (0.0011)0.488 (0.0250)16/21 → 16/21
Debatrix · whole debate
Gemma 4 31B
0.674 (0.000808)0.511 (0.0179)16/21 → 16/21
Debatrix · paired turn
Gemma 4 31B
0.570 (0.0070)0.276 (0.2264)11/21 → 11/21
Debatrix · whole debate
Qwen3 30B
0.490 (0.0240)0.172 (0.4572)14/21 → 14/21
Debatrix · paired turn
Qwen3 30B
0.460 (0.0358)0.187 (0.4181)12/21 → 12/21

For example, GPT-OSS whole-debate Overall changed from r = 0.728 to 0.609, but it still selected the poll-favoured candidate in 16/21 debates (76.2%). Always choosing the Democrat would match 15/21 polls (71.4%) in this sample. These counts are not agreement with independent human rubric ratings.

Inspect all 108 comparisons and download the values

The retained BH families are 16 whole-debate tests, 16 paired-turn tests, 12 claim/audience-mean tests, and 64 detailed audience tests. The six display groups above do not redefine these correction families. Threshold labels use unrounded values.

03 · Why can both signs change and r still fall?

13 debatesOriginal A was Democratic: unchanged
+
8 debatesOriginal A was Republican: reverse both margins
→
New pooled meansSame scores; different centered covariance and variances

Flipping both axes for every point preserves Pearson r. Flipping only a subset does not. Each recoded point is reflected through the origin, while the other points stay put. Pearson r is calculated around the new overall means.

Teal: 13 unchanged events. Orange: 8 recoded events. Axes remain fixed between views; hover a point for the debate and values. Coordinates are saved margins, not new evaluations.

A concrete decomposition: GPT-OSS whole-debate Overall

QuantityA/BD/R
Mean score margin1.73027.8889
Mean poll margin (percentage points)0.952410.1905
Σxy3,801.00003,801.0000
Centered cross-product: Σxy − n x̄ ȳ3,766.39682,112.7778
Within original-A-party groups: cross-product2,107.91672,107.9167
Between original-A-party groups: cross-product1,658.48024.8611
Pearson denominator (both variances)5,173.46443,469.1934
Pearson r0.72800.6090

In original A/B coding, events with a Democratic original A had mean score/poll margins of +7.77/+9.00; events with a Republican original A had −8.08/−12.13. The two group averages lay far apart along a positive diagonal. D/R recoding moves the latter averages to +8.08/+12.13, close to the first group. Much of the between-group cross-product disappears. Within each group, correlation is unchanged (0.591 and 0.648). The variances also change, so this is not a covariance-only explanation.

This does not show that the old analysis deliberately selected favourable debates, or that D/R recoding removed model bias. It shows that pooled correlation depends on the definition of the candidate contrast. The D/R contrast has a consistent party interpretation; the historical A/B contrast answers a different pooled question.
Formula and invariants
x′ᵢ = sᵢxᵢ,   y′ᵢ = sᵢyᵢ,   sᵢ ∈ {−1, +1}
r = (Σxy − n x̄ȳ) / √[(Σx² − n x̄²)(Σy² − n ȳ²)]

The sums Σxy, Σx² and Σy² remain identical, but the means need not. The identity of the higher-scored candidate, whether that candidate matches the poll leader, and absolute within-event margins stay unchanged. Group-demeaned correlations are also unchanged when the groups are the two original-A-party categories. A through-origin cosine would be invariant, but substituting it for Pearson r would change the research measure rather than solve the interpretive issue.

Why this also affects ClaimBuster, PROClaim and LLM-POTUS

The same sign recoding was applied to every saved candidate contrast. Each task has a different distribution of score margins, so its group means and centered covariance change differently. Gemma’s mean LLM-POTUS correlation increased from 0.047 (p = 0.839) to 0.629 (p = 0.0023). Qwen’s PROClaim correlation became more negative: −0.212 (p = 0.357) to −0.443 (p = 0.0442), and did not pass its retained BH adjustment. These changes are not explained by Debatrix’s memory architecture, because they also occur in other scoring tasks.

Ensemble results are a separate case

The 108 comparisons above reuse saved margins without fitting a new scorer. In contrast, an ensemble must be refitted after recoding both its inputs and target. Intercepts, training-fold centering/scaling, penalties and feature-pool selection can change its fitted predictions. The latest Appendix H reports nested-ensemble MAE of 11.851 → 11.904 under LOGO-CV and 12.328 → 13.175 under LOOCV. This is not new LLM inference, but it is a new regression fit. Do not explain ensemble changes solely with the Pearson formula.

04 · Does the memory / last-speaker hypothesis explain it?

It is a plausible hypothesis about how the original scores were produced, but it is not established by the A/B-to-D/R comparison. Recoding happened after scoring and changed neither the transcript nor the model’s memory.

ProcedureWhat the judge receivesImplication
Original DebatrixSpeeches processed sequentially; earlier analyses maintained by dimension; final judgments use accumulated analyses.Supports a memory-based architecture. It does not by itself prove that this study’s recoding effect is caused by primacy/recency.
Study: whole debateComplete candidate A block, then candidate B block; a fresh joint prompt; no sequential memory update.Potential block-position or truncation effects require controlled testing. The last block is not necessarily the actual last speaker.
Study: paired turnOne turn per candidate plus nearby moderator context; A before B; separate prompt per pair and dimension; no accumulated debate-wide notes.Not a faithful chronological-memory replication. Pair relevance, label preference and physical position remain separable candidate explanations.

Architecture source: Liang et al., Debatrix (ACL Findings 2024) · Official project. Study procedures: Methods §§3.4.1 and 3.4.5, archived prompt/runner snapshots.

Five things that must not be treated as the same

  1. The first person who actually speaks in the source transcript.
  2. The candidate assigned the historical label A by parsing/recovery rules.
  3. The first candidate text block in the prompt.
  4. The Democratic candidate used as A in the later statistical analysis.
  5. The actual last speaker, or the most recently presented text.

The retained-source audit finds B speaking first in four events, even though the historical prompt roster remains A/B. Initial detection could be overridden by predefined candidate pairs or recovery. Thus “A was always the first speaker” is not an accurate description of the final retained inputs. The current Methods already qualifies the ordering rule.

IDHistorical AFirst retained speaker = historical B
078Barack ObamaJohn McCain
134George H. W. BushMichael Dukakis
138Jimmy CarterRonald Reagan
140Gerald FordJimmy Carter

What the meeting supports—and what it does not

The 27 October transcript (approximately 23:35–29:15) discusses first/last speaker effects, the eight recoded debates, and possible label changes as explanations to investigate. It records uncertainty and requests to check what the numbers establish. It should not be cited as a confirmed causal diagnosis from the supervisor. The official Debatrix description confirms sequential analysis, but does not demonstrate that the absence of memory caused this dataset’s correlation decline.

A separate input-validity issue is real. The saved paired-turn audit identified a cross-question pair: a previous answer on China/trade was paired with a new abortion question and the opposing candidate’s answer. At least one stored judgment penalized relevance in that mismatched context. This establishes a possible scoring confound, not its prevalence or the proportion of the correlation change it explains. The full 2,664-pair audit and the counterbalanced A/B pilot remain paused.

Saved output checks reconstructed all 336 model–dimension–debate means (maximum absolute difference 1.78 × 10⁻¹⁵). Simple aggregation or identity-mapping errors did not explain the Gemma/Qwen B-heavy pattern in those checks. However, correct arithmetic does not validate the pairing task or rule out prompt-position effects.

05 · Decisions and remaining work

Already established from existing records

All 108 recoded correlations and nominal p-values were recalculated for this report and matched the archived values. The same 21 debates and eight sign reversals were verified, with no new LLM calls. Candidate-leader match counts are invariant. The professor-feedback statuses refer to the full manuscript compiled on 28 October.

Can be improved without new experiments

Explain the current ensemble-centered RQ2 to the supervisor; strengthen the Chen et al. (2026) comparison; document the unresolved poll-choice rule; keep the five meanings of “order” distinct. Continue showing both historical A/B and canonical D/R as a transparent sensitivity analysis, without choosing the direction that gives smaller p-values.

Needs validation before a causal explanation

Resume the full pair audit only when requested. On a fixed small sample, cross label assignment with physical prompt position; preserve candidate identity when scoring outputs. Test memory separately with matched sequential inputs, the same rubric and comparable generation settings. A simple whole-versus-paired comparison changes too many factors to isolate memory. Existing GPU work must not be interrupted.

Requires new data if the claim is expanded

Independent human rubric scores are needed to test human rubric-level agreement. Repetition across more debates and completed coverage are needed for a broad reliability claim. A one-debate low SD cannot establish unbiased evaluation, and neither a correlation nor a poll-leader match validates factual accuracy.

A defensible explanation for the professor

“The A/B-to-D/R change used the same 21 debates and saved candidate scores. Reversing both margins in eight debates changed the pooled means, covariance and variances, which explains the numerical change in Pearson correlation without any new model judgment. The identity of the higher-scored candidate and its agreement with the poll leader were unchanged. Whether candidate presentation order, pairing or the absence of chronological memory shaped the original scores remains a separate, untested causal question.”

06 · Evidence and scope

  1. Supervisor’s shared ChatGPT conversation. Reviewed against the saved full visible transcript from 27 October. Direct prompts are distinguished from generated recommendations.
  2. Current manuscript: the verified 28 October Overleaf source export and compiled 48-page PDF, including all sections and appendices. No manuscript edits were made for this report.
  3. Frozen 21-event original-order and D/R arrays, event-orientation manifest, series dictionary and saved correlation tables. All 216 r/p pairs were recalculated; retained BH q-values were read from the existing family-adjusted tables.
  4. Original-A-party covariance decomposition, candidate-mapping audit, saved runner/prompt snapshots, and the paired-turn audit records dated 28 October. Prior Claude/Gemini comments informed that earlier audit; this report does not claim a new joint review or fresh inspection of remote GPUs.
  5. Debatrix: Multi-dimensional Debate Judge with Iterative Chronological Analysis Based on LLM · Official repository. Primary source for the original architecture; local implementation claims come from the study records.
  6. Eka meeting transcript, 27 October, approximately 23:35–29:15: explanatory hypotheses, not confirmed mechanisms. Full meeting text and private chat logs are not republished here.
  7. Earlier study-changes dashboard. Context only. This report uses the later retained-source mapping audit rather than assuming A always spoke first.