Beyond Semantics: Modeling Factual and Affective Perceptual Experiences from Vision-Language Data
Pith reviewed 2026-06-28 11:17 UTC · model grok-4.3
The pith
PercepT discovers visual-textual clusters that combine factual content with affective perception experiences and maps new images to those clusters.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
PercepT discovers P-Topics as visual-textual clusters through an unsupervised objective in its formation stage that dynamically selects the number of clusters, then learns P-Topic mapping functions via attention pooling in the mapping stage to associate images with their corresponding clusters.
What carries the argument
PercepT, a two-stage architecture whose formation stage produces unsupervised visual-textual clusters and whose mapping stage applies attention pooling to assign images to those clusters.
If this is right
- Images can be grouped and retrieved according to combined factual and affective criteria rather than semantics alone.
- The number of perception topics can adjust automatically to the richness of any given vision-language collection.
- Mapping functions learned via attention pooling allow new images to be placed into existing perception experiences without retraining the clusters.
- Human judgments confirm that the clusters reflect semantically coherent perception experiences rather than artifacts of the training objective.
Where Pith is reading between the lines
- The same two-stage structure could be applied to datasets that include explicit cultural or emotional annotations to test cross-dataset stability of the discovered clusters.
- If the clusters truly separate affective dimensions, downstream tasks such as caption generation conditioned on a chosen P-Topic might produce more varied emotional tone.
- The dynamic cluster selection mechanism suggests a way to compare perceptual richness across different image domains without fixing the number of topics in advance.
Load-bearing premise
The unsupervised clusters formed from visual-textual pairs correspond to distinct factual-plus-affective perception experiences instead of purely semantic or visual groupings.
What would settle it
A controlled human study in which raters judge whether images assigned to the same discovered cluster share the same factual-affective perception experience; performance no better than random assignment would falsify the claim.
Figures
read the original abstract
We present P-Topics (Perception Topics) modeling, a novel problem for understanding how images are perceived affectively and across cultures. The goal is to (1) discover and model the different perception experiences in a dataset of images and captions, where each experience is defined by an objective factual and a subjective affective aspect, and (2) associate images to their relevant perception experiences. We introduce **PercepT** (**Percep**tion topic **T**ransformer), a two-stage architecture that tackles P-Topics modeling. In the formation stage, percepT discovers *P-Topics* as visual-textual clusters using an unsupervised training objective, and dynamically selects the number of clusters to match the perceptual richness of the dataset. In the mapping stage, it learns *P-Topic mapping functions* via attention pooling to associate images to their respective clusters. On ArtELingo, PercepT achieves a silhouette score of **0.97** compared to **0.37** from the closest baseline reflecting better perceptual clusters. PercepT also achieves an AUC score of **0.94** compared to **0.77** showing better mapping to perceptual clusters. Human evaluation confirms that PercepT captures semantically meaningful perception experiences and significantly outperforms existing methods. Our implementation will be made public.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper introduces P-Topics modeling as a new problem for discovering perception experiences (each defined by an objective factual aspect and a subjective affective aspect) from vision-language image-caption data, along with associating images to those experiences. It presents PercepT, a two-stage transformer: an unsupervised formation stage that discovers P-Topics as visual-textual clusters with dynamic cluster count selection, and a mapping stage that uses attention pooling to associate images to clusters. On the ArtELingo dataset, PercepT reports a silhouette score of 0.97 (vs. 0.37 for the closest baseline) and AUC of 0.94 (vs. 0.77), with human evaluation confirming semantically meaningful experiences; the implementation will be released publicly.
Significance. If the unsupervised clusters can be shown to isolate factual-plus-affective perceptual experiences (including cross-cultural affective dimensions) rather than standard semantic or visual similarity, the framework would offer a concrete advance in moving vision-language models beyond purely semantic representations toward modeling subjective perception. The public code release would support reproducibility and follow-up work.
major comments (2)
- [Abstract / Formation stage] Abstract / Formation stage: The central claim that P-Topics capture 'objective factual and a subjective affective aspect' (and go 'beyond semantics') rests on the unsupervised clustering objective producing clusters aligned with this definition. However, the only human evaluation described confirms 'semantically meaningful' experiences; no ablation (e.g., comparison against CLIP-only semantic clustering) or affective annotation of clusters is reported to isolate the affective component or rule out that clusters reflect visual/textual similarity instead.
- [Abstract] Abstract: The headline performance numbers (silhouette 0.97, AUC 0.94) are presented without any description of baseline implementations, data splits, statistical testing, or the precise computation of the silhouette and AUC metrics. This prevents verification that the metrics are independent of training choices or cluster-selection decisions and directly support the superiority claim.
minor comments (1)
- [Abstract] The abstract states that human evaluation 'significantly outperforms existing methods' but provides no quantitative details (e.g., inter-annotator agreement, exact rating scales, or statistical tests) on the human study.
Simulated Author's Rebuttal
We thank the referee for the constructive feedback, which highlights important aspects of our evaluation methodology. We address each major comment below and outline revisions to strengthen the manuscript.
read point-by-point responses
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Referee: [Abstract / Formation stage] Abstract / Formation stage: The central claim that P-Topics capture 'objective factual and a subjective affective aspect' (and go 'beyond semantics') rests on the unsupervised clustering objective producing clusters aligned with this definition. However, the only human evaluation described confirms 'semantically meaningful' experiences; no ablation (e.g., comparison against CLIP-only semantic clustering) or affective annotation of clusters is reported to isolate the affective component or rule out that clusters reflect visual/textual similarity instead.
Authors: The ArtELingo dataset captions explicitly encode both factual descriptions and affective, cross-cultural perceptions, and our formation stage clusters on joint vision-language embeddings derived from these pairs. This design aims to go beyond pure semantics by leveraging affective language in the textual component. We agree that an explicit ablation against CLIP-only clustering would better isolate the contribution of affective signals, and we will add this comparison (along with cluster-level affective analysis where possible) in the revised manuscript. revision: yes
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Referee: [Abstract] Abstract: The headline performance numbers (silhouette 0.97, AUC 0.94) are presented without any description of baseline implementations, data splits, statistical testing, or the precise computation of the silhouette and AUC metrics. This prevents verification that the metrics are independent of training choices or cluster-selection decisions and directly support the superiority claim.
Authors: We agree that the experimental details require expansion for full reproducibility and verification. The revised manuscript will include a dedicated experimental setup subsection describing baseline implementations, data splits, any statistical significance testing, and the exact formulas and procedures used to compute silhouette scores and AUC (including their relation to dynamic cluster selection). revision: yes
Circularity Check
No significant circularity; evaluation metrics are standard and independent of any derivation chain
full rationale
The paper describes a two-stage unsupervised clustering plus mapping architecture with no equations or derivations shown. Performance is reported via standard external metrics (silhouette score, AUC) on held-out data. No self-definitional reductions, fitted inputs renamed as predictions, or load-bearing self-citations are present in the provided text. The central claim rests on empirical separation of clusters rather than any mathematical identity or construction that collapses the result to its inputs.
Axiom & Free-Parameter Ledger
Reference graph
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