REVIEW 4 major objections 4 minor 14 references
Automating Feedback Analysis in Surgical Training: Detection, Categorization, and Assessment
T0 review · 4 major / 4 minor · reviewed 2026-08-12 · deepseek-v4-flash
Pith's one-line read An automated speech pipeline detects trainer-to-trainee feedback from raw operating-room audio with an F1 of 0.79 on unseen surgeries, the authors report.
desk verdict End-to-end surgical feedback detection from OR audio is a real step forward, but the headline F1 rests on an under-validated GPT-4o alignment step and an ambiguous anchor protocol. read the letter →
The pith
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
The reading
What carries the argument
The central mechanism is a cosine-similarity gate against anchor voice embeddings. For each trainer and trainee, at least five clean anchor audio segments are selected, embedded with a pretrained speaker-embedding model, and every diarized speech segment is compared with all anchors on both sides; an average similarity below 0.2 on both sides marks the segment as a hallucination or unrelated speaker, and otherwise the segment is assigned to whichever of trainer or trainee has the higher similarity. This single step both filters the noise-inflated speech-to-text output and supplies the speaker roles that feedback detection needs, because the clinically validated definition of feedback requires a trainer addressing an actively operating trainee. Downstream, a GPT-4o classifier consumes the reconstructed dialogue together with the role labels to decide feedback presence, to predict trainee acknowledgment and behavioral adjustment, and to label feedback as anatomic, procedural, or technical.
What would settle it
Recompute feedback detection on the same five test surgeries using strict timestamp overlap between human-annotated feedback intervals and the ASR segments instead of the GPT-4o semantic alignment, and compare the F1 with the reported 0.79; if it falls to the 0.66 level of the hallucination-removal stage, the alignment step is carrying the result. Separately, audit the anchor segments for the five test surgeries: if any anchor audio overlaps the test recordings, the trainer/trainee identification numbers reflect in-domain enrollment rather than deployment behavior.
Extended reading notes
Core claim
The paper's central claim is that a fully automated dialogue-reconstruction pipeline — voice activity detection, speaker diarization, speech-to-text, then a refinement stage that deletes hallucinated fragments and labels each utterance as trainer or trainee — can recover enough of the teaching interaction to support clinical-grade feedback analysis. The refinement stage is the key addition: it embeds each candidate speech segment and compares it by cosine similarity to few-shot anchor voice samples of the trainer and trainee, discarding segments that match neither (the hallucinations) and assigning the rest to the closer speaker. Removing hallucinations improves feedback detection F1 from 0.58 to 0.66, and adding the trainer/trainee assignment raises it to 0.79. When the reconstructed dialogue is fed to a large language model, the resulting Behavioral Adjustment predictions (F1 0.82) and Technical feedback classifications (F1 0.81) are comparable to or better than using selective human transcriptions. The paper frames the result as the first demonstration that surgical feedback can be quantified at scale from real-world recordings.
Load-bearing premise
The reported detection F1 assumes that the GPT-4o alignment step, with its five-second tolerance and semantic matching, does not inflate the match between automated transcripts and human annotations, and that the anchor voice samples identifying trainers and trainees were not taken from the same test-surgery recordings used for scoring.
Editorial extensions
If this is right
- Detection of feedback from raw operating-room audio reaches F1 0.79 on unseen surgeries, so surgical teaching can be quantified without manual review of full procedures.
- The hallucination-removal step contributes roughly 14 percent of detection performance, which means off-the-shelf speech recognition on operating-room audio is materially degraded by noise-generated filler utterances.
- Automated transcripts with dialogue context outperform selective human transcription as input for Behavioral Adjustment prediction (F1 0.82 versus 0.78) and for Technical-feedback classification (F1 0.81 versus 0.78).
- Because the pipeline relies on data organization and pretrained components rather than a surgery-specific fine-tuned model, the authors expect it to transfer to other educational clinical settings where guidance is delivered verbally.
Reading between the lines
- If the anchor samples are truly collected before surgery as enrollment, the method needs no in-procedure labeling, so a deployment version could register each trainer-trainee pair once and then process future cases unattended; the paper leaves ambiguous whether the five test surgeries used pre-surgery enrollment or anchors cut from the same recordings.
- The gain attributed specifically to hallucination removal suggests that operating-room noise does not just corrupt words but fabricates short acknowledgements that mimic trainee responses, so filtering before classification may matter more than improving the recognizer itself.
- With enrollment done at case start, the same refinement gate could operate in near real time and flag feedback moments within seconds of utterance, enabling in-surgery coaching analytics instead of post-hoc review.
- The evaluation uses a five-second tolerance plus GPT-4o semantic matching to align automated transcripts with human annotations; a stricter timestamp-overlap benchmark would show how much of the 0.79 F1 depends on that semantic leniency.
Signed reviews
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper proposes a fully automated pipeline for analyzing verbal feedback in surgical training. It combines voice activity detection, speaker diarization, and ASR to reconstruct surgical dialogue, then applies a novel hallucination-removal and trainer/trainee identification step based on few-shot speaker embeddings. The reconstructed dialogues are passed to GPT-4o for three clinical tasks: feedback detection, feedback effectiveness assessment, and feedback component classification. The authors evaluate on 33 real-world surgeries with a held-out test set of five unseen surgeries, reporting a feedback-detection F1 of 0.79 ± 0.07, a roughly 14% gain from hallucination removal, and downstream F1 scores of 0.82 ± 0.03 and 0.81 ± 0.03 for behavioral adjustment and technical feedback classification, respectively.
Significance. If the reported results hold, this would be a practically valuable step toward scalable, automated analysis of surgical teaching interactions. The paper has several concrete strengths: it uses a substantial real-world dataset with 4,210 clinically validated feedback annotations; it reports confusion matrices and per-step ablations in the appendices; it discloses the thresholds used in processing; it compares against multiple fixed-window baselines and an existing hallucination-removal method; and the code is publicly available. The main contribution is the integration of existing speech-processing components with a speaker-embedding-based refinement step, and the evaluation on clinically relevant downstream tasks is appropriate. However, the central detection result depends on an unvalidated LLM-based alignment procedure, and several methodological ambiguities need to be resolved before the claims can be accepted at face value.
major comments (4)
- [§4.1.2, Appendix E] The reported F1 = 0.79 ± 0.07 in Table 2 depends on a GPT-4o alignment step that has not been validated against human judgments. The prompt in Appendix E asks whether two strings 'have any alignment' by common words and meaning, and Section 4.1.2 adds a 5-second tolerance; because human annotations record only feedback start times (Appendix M), there is no temporal-overlap quantity to constrain the match. A permissive semantic match can count a predicted segment as a true positive even when the predicted utterance is not the annotated feedback event, inflating both precision and recall. Please report inter-annotator agreement on the alignment judgment, a sensitivity analysis over the tolerance (e.g., 1s, 3s, 5s, 10s), and a stricter temporal-alignment baseline, and confirm that the hallucination-removal gain in Table 2 is stable under that baseline.
- [§3.4, §6] There is a direct contradiction between the anchor-collection descriptions. Section 3.4 states that anchor segments are chosen 'across the surgery duration,' while Section 6 says the method 'requires collecting clean speech before surgery.' The paper never states which procedure was used for the five test surgeries. If anchors were extracted from the test recordings, then the Trainer/Trainee ID results in Table 2 include in-domain enrollment and overestimate deployment performance, where anchors would need to be collected beforehand. Please state the anchor collection procedure for the test cases explicitly, and if anchors come from the test recordings, re-evaluate with anchors from prior surgeries or assess sensitivity to the number and placement of anchors.
- [Table 3, §4.2.1, §5.2, §5.3] The comparison against 'Manual annotations' is not like-for-like. The human baseline is 'Human Selective Transcription,' where annotators transcribed only the trainer's feedback, often selectively and without surrounding dialogue context, while the automated pipeline receives the full reconstructed dialogue including context (Section 4.2.1 and Discussion). The claim of surpassing human annotation in downstream tasks may therefore reflect an information asymmetry rather than superior automated analysis. Please reframe the comparison as an ablation over input context, or add a controlled baseline where the same GPT-4o classifier sees only the detected feedback phrase without dialogue context, and, if possible, a manual-annotation baseline with full transcripts.
- [§3.4, Appendix J, Table 2] The cosine-similarity threshold of 0.2 used for hallucination removal is selected using a proxy label ('trivial hallucinations' defined by running ASR twice) and a 'Precision-Leaning Mean' metric, rather than on the feedback-detection task itself. The reported ~14% improvement from hallucination removal in Table 2 is therefore partly a function of a threshold tuned to a proxy, and no sensitivity analysis over this threshold is reported for the final feedback-detection F1. Please report feedback-detection F1 across a range of cosine thresholds (e.g., 0.1, 0.2, 0.3, 0.4) and confirm that the improvement is stable; also clarify the direction of the precision/recall relationship in Appendix J, where precision decreases as the threshold increases.
minor comments (4)
- [Abstract, Table 2] The abstract contains a typo ('recaognition'), and Table 2's header 'T echnique' has stray spacing; please proofread the manuscript carefully.
- [§4, Tables 2-3] The paper reports results on five unseen surgeries, but the fixed-window baselines are trained with five IID splits; it is unclear whether the reported ± values are standard deviations over surgeries, over splits, or over both. Please state the aggregation procedure explicitly.
- [§4.2.2] Tasks 2 and 3 are evaluated only on true-positive feedback phrases from Task 1, making the downstream F1 scores conditional on detection performance. This should be stated explicitly, or end-to-end results should be reported, so readers do not interpret Table 3 as full-pipeline performance.
- [Appendix J] The caption of Appendix J says the 'Precision-Leaning Mean' prioritizes precision, but the table shows precision decreasing as the threshold increases; the metric direction and the intended operating point should be clarified.
Circularity Check
No circular derivation: the pipeline is benchmarked against external human annotations; remaining concerns are evaluation-validity risks, not self-referential reductions.
full rationale
The paper's claims are empirical measurements of a fixed pipeline against human-annotated surgical feedback. The feedback definition and labels are imported from Wong et al. (2023), a prior study with overlapping authors, but those labels are externally produced human judgments and the test set is five unseen surgeries, so the citation is data, not a forced conclusion. The cosine threshold 0.2 is selected in Appendix J using a Koenecke et al. hallucination proxy, but the headline F1=0.79 and the ~14% improvement are computed on human feedback labels, so this is ordinary hyperparameter selection rather than a fitted parameter renamed as a prediction. The GPT-4o alignment step (App. E) and the ambiguity between anchor selection "across the surgery duration" (Sec. 3.4) and "clean speech before surgery" (Sec. 6) are legitimate threats to the validity of the reported F1, but they do not make any derived quantity equal to its inputs by construction. No equation-level or definitional reduction was found, so per the quoting standard no circular step can be exhibited.
Assumptions & free parameters
free parameters (5)
- VAD threshold =
0.3
- Cosine similarity threshold for hallucination removal =
0.2
- Evaluation alignment tolerance =
5 seconds
- Number of anchor voice samples per speaker =
at least 5
- Fixed-window size and overlap =
10 seconds with 5-second overlap
assumptions (5)
- domain assumption The Wong et al. (2023) definition of surgical feedback and the 4,210 human-annotated feedback labels are accurate ground truth.
- domain assumption x-vector embeddings of speech segments remain discriminative for trainer vs trainee in noisy OR audio, and the selected anchor segments represent each speaker's stable vocal identity.
- domain assumption Pre-trained components (webrtcvad, pyannote speaker-diarization-3.1, Whisper, wav2vec, BERT, GPT-4o) perform as documented when applied to surgical audio.
- domain assumption GPT-4o-based alignment and classification prompts yield labels that are valid proxies for the human judgments they are compared against.
- standard math McNemar's test assumptions (paired binary predictions) hold for the ablation comparisons.
Cite this review
Pith. "Pith review of Automating Feedback Analysis in Surgical Training: Detection, Categorization, and Assessment." pith.science (2026). https://pith.science/paper/BUBRPGKU
@misc{pith2026241200760,
author = {Pith},
title = {Pith review of: Automating Feedback Analysis in Surgical Training: Detection, Categorization, and Assessment},
year = {2026},
howpublished = {\url{https://pith.science/paper/BUBRPGKU}},
note = {Machine review of arXiv:2412.00760}
}
read the original abstract
This work introduces the first framework for reconstructing surgical dialogue from unstructured real-world recordings, which is crucial for characterizing teaching tasks. In surgical training, the formative verbal feedback that trainers provide to trainees during live surgeries is crucial for ensuring safety, correcting behavior immediately, and facilitating long-term skill acquisition. However, analyzing and quantifying this feedback is challenging due to its unstructured and specialized nature. Automated systems are essential to manage these complexities at scale, allowing for the creation of structured datasets that enhance feedback analysis and improve surgical education. Our framework integrates voice activity detection, speaker diarization, and automated speech recaognition, with a novel enhancement that 1) removes hallucinations (non-existent utterances generated during speech recognition fueled by noise in the operating room) and 2) separates speech from trainers and trainees using few-shot voice samples. These aspects are vital for reconstructing accurate surgical dialogues and understanding the roles of operating room participants. Using data from 33 real-world surgeries, we demonstrated the system's capability to reconstruct surgical teaching dialogues and detect feedback instances effectively (F1 score of 0.79+/-0.07). Moreover, our hallucination removal step improves feedback detection performance by ~14%. Evaluation on downstream clinically relevant tasks of predicting Behavioral Adjustment of trainees and classifying Technical feedback, showed performances comparable to manual annotations with F1 scores of 0.82+/0.03 and 0.81+/0.03 respectively. These results highlight the effectiveness of our framework in supporting clinically relevant tasks and improving over manual methods.
Figures
Reference graph
Works this paper leans on
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[1]
Anatomic: familiarity with anatomic structures and landmarks. i.e. ’Stay in the correct plane, be- tween the 2 fascial layers.’
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[2]
Procedure: pertains to timing and sequence of surgical steps. i.e. ’You can switch to the left side now.’
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[3]
Technical: performance of a discrete task with appropriate knowledge of factors including exposure, instruments, and traction. i.e. ’Buzz it.’
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[4]
Praise: a positive remark. i.e. ’Good job.’
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[5]
Criticism: a negative remark. i.e. ’It should never be like this.’ User Prompt: Classify whether the following phrase contains the delivery of feedback considering the given context of the last couple turns in the dia- logue where the phrase is the last entry in the context. Format your response as follows. DO NOT DO ANY OTHER FORMATTING.: {’feedback’: ’y...
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[9]
Behavioral Change: This refers to any physical or observable adjustment made by the trainee that directly corresponds to the feedback received. For example: - If the trainer suggests tightening a suture, the trainee immediately pulls the suture thread more tightly. Your role is to predict which type(s) of response the trainee is likely to give based on th...
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[10]
Examples include: - ”Okay, I see” - ”Uh-huh, got it” - ”Understood” - ”Yes, I’ll do that”
Verbal Acknowledgement: This includes any verbal or audible confirmation from the trainee indi- cating they have heard and understood the feedback. Examples include: - ”Okay, I see” - ”Uh-huh, got it” - ”Understood” - ”Yes, I’ll do that”
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[11]
Behavioral Change: This refers to any physical or observable adjustment made by the trainee that directly corresponds to the feedback received. For example: - If the trainer suggests tightening a suture, the trainee immediately pulls the suture thread more tightly. Your role is to predict which type(s) of response the trainee is likely to give based on th...
Show all 14 references
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[14]
Technical: Performance of a discrete task with appropriate knowledge of factors including exposure, instruments, and traction. Examples include: - ”Ad- just the tension on the suture.” - ”Buzz it.” Your role is to predict which type(s) of feedback the phrase contains based on ...
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[15]
Examples include: - ”Stay in the correct plane, between the 2 fascial layers.” - ”Avoid the blood vessels here.”
Anatomic: Familiarity with anatomic structures and landmarks. Examples include: - ”Stay in the correct plane, between the 2 fascial layers.” - ”Avoid the blood vessels here.”
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[16]
Examples include: - ”You need to suture this area first.” - ”You can switch to the left side now.”
Procedural: Pertains to the timing and sequence of surgical steps. Examples include: - ”You need to suture this area first.” - ”You can switch to the left side now.”
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[17]
Technical: Performance of a discrete task with appropriate knowledge of factors including exposure, instruments, and traction. Examples include: - ”Ad- just the tension on the suture.” - ”Buzz it.” Your role is to predict which type(s) of feedback the phrase contains based on ...
2024
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[152]
Springer, 2023. Juan M. Coria, Herv´ e Bredin, Sahar Ghannay, and Sophie Rosset. A Comparison of Metric Learning Loss Functions for End-To-End Speaker Verifica- tion. In Luis Espinosa-Anke, Carlos Mart ´ ın-Vide, and Irena Spasi´ c, editors,Statistical Language and Speech Proc...
2023 arXiv
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[267]
Allison Koenecke, Anna Seo Gyeong Choi, Katelyn X Mei, Hilke Schellmann, and Mona Sloane
PMLR, 2023. Allison Koenecke, Anna Seo Gyeong Choi, Katelyn X Mei, Hilke Schellmann, and Mona Sloane. Careless whisper: Speech-to-text hallucination harms. In The 2024 ACM Conference on Fairness, Account- ability, and Transparency, pages 1672–1681, 2024. Korbinian Kuhn, Verena...
2023 arXiv
Reviewed August 12, 2026 · model on record in the stance chip above.
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