Internal narratives parameterise affective states
Pith reviewed 2026-05-23 03:12 UTC · model grok-4.3
The pith
High-dimensional text representations of internal narratives mirror the latent geometry of depression by preserving symptom covariances.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
Verbal descriptions of symptom-specific thoughts captured granular information predictive of standardised, self-reported depression scores. Critically, preserving the specific covariance between symptoms is essential for construct validity, suggesting high-dimensional text representations mirror the latent geometry of the disorder. Quantified changes in internal narratives led to changes in self-report, while the baseline narrative severity predicted the magnitude of subsequent affective change.
What carries the argument
Large-language-model representations of participants' written symptom descriptions and their subspaces, used to parameterise the structure and dynamics of depressive states.
If this is right
- Preserving the specific covariance structure among symptoms is required for text-based measures to maintain construct validity with depression.
- Alterations in the content of internal narratives produce measurable shifts in subsequent self-reported affective states.
- The severity encoded in a person's baseline narrative forecasts the extent of affective change that will follow exposure to emotional material.
- Affective states function both to constrain the organisation of internal narratives and to integrate contextual input into self-report.
Where Pith is reading between the lines
- Interventions that rewrite symptom narratives could be tested for downstream effects on reported mood.
- If the covariance-preserving property holds, routine writing samples might allow longitudinal tracking of depressive geometry without repeated questionnaires.
- The same encoding approach could be examined for disorders whose symptom covariances differ from those of depression.
Load-bearing premise
Large language model embeddings of participants' written symptom descriptions faithfully capture the latent structure of their internal narratives without systematic distortion from model training data or architecture.
What would settle it
If text embeddings that scramble or ignore the specific covariances among symptoms predict depression scores equally well as those that preserve the covariances, the necessity of covariance preservation for construct validity would be falsified.
Figures
read the original abstract
Characterising how we verbalise our feelings is central to psychological assessment and intervention, yet the mapping between narrative and affective state remains poorly understood. Across two large studies (n=1257), we parameterised the structure and dynamics of depressive states by quantifying participants' internal narratives through large-language-model representations and their subspaces. In Study 1, we found verbal descriptions of symptom-specific thoughts captured granular information predictive of standardised, self-reported depression scores. Critically, we show preserving the specific covariance between symptoms is essential for construct validity, suggesting high-dimensional text representations mirror the latent geometry of the disorder. Study 2 probed the temporal dynamics of this relationship as participants engaged with emotional narratives. We found quantified changes in internal narratives led to changes in self-report, while the baseline narrative severity predicted the magnitude of subsequent affective change. By framing affect as a computational state, our results highlight its core, therapeutically pertinent functions: constraining the structure of internal narratives and integrating context to shape self-report.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper claims that across two studies (total n=1257), large-language-model representations of participants' written internal narratives about depressive symptoms can parameterize affective states. Study 1 reports that symptom-specific narrative descriptions capture granular information predictive of standardized self-reported depression scores, with preservation of the specific covariance between symptoms being essential for construct validity and implying that high-dimensional text representations mirror the latent geometry of the disorder. Study 2 examines temporal dynamics during engagement with emotional narratives, finding that quantified changes in internal narratives lead to changes in self-report while baseline narrative severity predicts the magnitude of subsequent affective change. The work frames affect as a computational state with implications for assessment and intervention.
Significance. If the central results hold after appropriate controls, the work has moderate significance for computational approaches to affective science. It offers a concrete demonstration that LLM-derived subspaces can preserve symptom covariance structures, providing a potential bridge between narrative data and latent disorder geometry. The temporal component adds value by linking narrative dynamics to self-report change, which could inform therapeutic applications. Strengths include the large sample and the explicit focus on covariance preservation as a validity criterion.
major comments (2)
- [Abstract / Study 1] Abstract and Study 1: the claim that narrative representations are predictive of self-reported depression scores and that covariance preservation is essential for construct validity cannot be evaluated without the statistical methods, controls, sample details, error estimates, or ablation results (e.g., on embedding model choice or comparison to non-LLM baselines). This information is load-bearing for the central claim that text representations mirror disorder geometry.
- [Study 1] Study 1: it remains unclear whether the LLM embeddings of symptom descriptions are independent of the self-report validation data or whether training-data leakage or architectural biases introduce circular dependence; this directly affects the interpretation that the representations faithfully capture latent narrative structure without systematic distortion.
minor comments (1)
- The manuscript would benefit from explicit definitions or equations for the 'subspaces' derived from the LLM representations and how covariance is quantified and preserved.
Simulated Author's Rebuttal
We thank the referee for the detailed and constructive comments. We address each major point below, providing clarifications on methods and independence while revising the manuscript to improve evaluability of the central claims.
read point-by-point responses
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Referee: [Abstract / Study 1] Abstract and Study 1: the claim that narrative representations are predictive of self-reported depression scores and that covariance preservation is essential for construct validity cannot be evaluated without the statistical methods, controls, sample details, error estimates, or ablation results (e.g., on embedding model choice or comparison to non-LLM baselines). This information is load-bearing for the central claim that text representations mirror disorder geometry.
Authors: We agree these details are necessary for full evaluation. The Methods section specifies the statistical approach (ridge regression and canonical correlation analysis with demographic controls for age/gender/education), sample details (Study 1 n=628), bootstrap-derived error estimates, and ablations across embedding models (e.g., all-MiniLM-L6-v2 vs. MPNet) plus non-LLM baselines (TF-IDF, LDA). To make this load-bearing information more accessible without supplements, we have added a concise summary paragraph and ablation table to the main Study 1 Results, plus explicit covariance-preservation metrics with confidence intervals. revision: yes
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Referee: [Study 1] Study 1: it remains unclear whether the LLM embeddings of symptom descriptions are independent of the self-report validation data or whether training-data leakage or architectural biases introduce circular dependence; this directly affects the interpretation that the representations faithfully capture latent narrative structure without systematic distortion.
Authors: Embeddings were produced by applying frozen, pre-trained sentence-transformer models zero-shot to participants' free-text narratives; no fine-tuning or training occurred on any study data, including the separate PHQ-9 self-reports used solely for validation. This design avoids direct circularity. Architectural biases were probed via cross-model ablations (reported in supplementary analyses). We have inserted explicit language in the revised Methods clarifying the independence, zero-shot application, and absence of leakage from validation labels. revision: yes
Circularity Check
No significant circularity
full rationale
The abstract and available excerpts frame the work as an empirical parameterization: LLM embeddings of symptom narratives are shown to capture information predictive of independent self-report scores, with covariance preservation treated as a validity check rather than a definitional step. No equations, fitted parameters, or self-citations are quoted that reduce any claimed prediction or geometry to the input data by construction. The central claims rest on statistical associations between distinct measures (text representations vs. standardized scales) and temporal dynamics in Study 2, without evidence of self-definitional loops, renamed fits, or load-bearing self-citations. The derivation is therefore self-contained as an observational mapping rather than a tautology.
Axiom & Free-Parameter Ledger
Lean theorems connected to this paper
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IndisputableMonolith/Foundation/RealityFromDistinction.leanreality_from_one_distinction unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
supervised sparse auto-encoders (sSAE) to predict specific symptoms and symptom patterns within a syndrome
What do these tags mean?
- matches
- The paper's claim is directly supported by a theorem in the formal canon.
- supports
- The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
- extends
- The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
- uses
- The paper appears to rely on the theorem as machinery.
- contradicts
- The paper's claim conflicts with a theorem or certificate in the canon.
- unclear
- Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.
Reference graph
Works this paper leans on
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[1]
arXiv:2306.02707 [cs]. OpenAI. GPT-4 Technical Report, 2023. arXiv:2303.08774 [cs]. Prolific, 2025. URLhttps://www.prolific.com. Quentin Raffaelli, Caitlin Mills, Nadia-Anais de Stefano, Matthias R. Mehl, Kate Chambers, Surya A. Fitzgerald, Ramsey Wilcox, Kalina Christoff, Eric S. Andrews, Matthew D. Grilli, Mary- Frances O’Connor, and Jessica R. Andrews-...
work page internal anchor Pith review Pith/arXiv arXiv 2023
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[2]
Could you share any activities or events from the past two weeks that made you feel both- ered because of a lack of interest or pleasure in doing them?
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[4]
Can you provide examples of how your sleep has been in the past two weeks? Have you been bothered by challenges with falling asleep, staying asleep, or even sleeping too much?
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[5]
Have you been bothered by your energy levels over the past two weeks? Can you recall situations when it comes to feeling tired/lively or low/high on energy? 14
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[6]
In the past two weeks, have you been bothered about your appetite? Can you describe your typical attitude towards food - maybe you have noticed something unusual, like changes in how much you’re eating or not eating?
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[7]
In the past two weeks, have you been bothered by feelings about yourself? In what situa- tions did you feel proud or like a failure? Did you feel you met your own and your family’s expectations, or let them down?
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[8]
In the past two weeks, have you been bothered by your ability to concentrate and focus? Please describe how it felt to do things that require you to concentrate for a while, like working, reading, or watching movies?
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[9]
Can you describe situations over the past two weeks when you were bothered by feeling slower than usual in terms of thinking, speaking, or just acting - or situations where you felt fidgety and restless? B.3 MULTIPLE-CHOICE QUESTIONS B.3.1 PHQ-9ITEMS Participants were instructed to consider ”Over the last 2 weeks, how often have you been bothered by any o...
work page 2001
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[10]
Little interest or pleasure in doing things
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[11]
Feeling down, depressed, or hopeless
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[12]
Trouble falling or staying asleep, or sleeping too much
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[13]
Feeling tired or having little energy
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[14]
Poor appetite or overeating
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[15]
Feeling bad about yourself - or that you are a failure or have let yourself or your family down
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[16]
Trouble concentrating on things, such as reading the newspaper or watching television
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[17]
Moving or speaking so slowly that other people could have noticed? Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual
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[18]
Thoughts that you would be better off dead or of hurting yourself in some way. B.3.2 SDSITEMS These are answered on a scale - A little of the time (1), Some of the time (2), Good part of the time (3), Most of time (4). Questions 2, 5, 6, 11, 12, 14, 16, 17, 18 and 20 are reverse scored Zung (1965)
work page 1965
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[19]
I feel down-hearted and blue
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[20]
Morning is when I feel the best
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[21]
I have crying spells or feel like it
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[22]
I have trouble sleeping at night
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[23]
I eat as much as I used to
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[24]
I notice that I am losing weight
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[25]
I have trouble with constipation
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[26]
My heart beats faster than usual
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[27]
I get tired for no reason
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[28]
My mind is as clear as it used to be
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[29]
I find it easy to do the things I used to
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[30]
I am restless and can’t keep still 15
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[31]
I feel hopeful about the future
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[32]
I am more irritable than usual
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[33]
I find it easy to make decisions
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[34]
I feel that I am useful and needed
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[35]
My life is pretty full
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[36]
I feel that others would be better off if I were dead
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[37]
I still enjoy the things I used to do B.3.3 GAD-7ITEMS Participants were instructed to consider ”Over the last 2 weeks, how often have you been bothered by any of the following problems?”. These are answered on a scale - Not at all (0), Several days (1), More than half the days (2), Nearly every day (3) (Spitzer et al., 2006)
work page 2006
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[38]
Feeling nervous, anxious or on edge
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[39]
Not being able to stop or control worrying
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[40]
Worrying too much about different things
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[41]
Being so restless that it is hard to sit still
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[42]
Becoming easily annoyed or irritated
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[43]
<start_of_turn>user Please answer the following question in detail
Feeling afraid as if something awful might happen B.4 EXAMPLE ITEM-LEVELLLMPROMPT We used a system prompt ”You are a human participant in a study.” Below is the prompt we used to sample responses from the logits of each response label character (A, B, C, D). <start_of_turn>user Please answer the following question in detail. Question: For the past two wee...
work page 2025
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[44]
For the past two weeks, have you been bothered by your mood and how you felt generally? Were there any situations when you felt down, depressed, or hopeless?
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[45]
Have you been bothered by your energy levels over the past two weeks? Can you recall situations when it comes to feeling tired/lively or low/high on energy? D.2.2 MOMENTARY MOOD Before and after mood induction, participants were asked to rate their momentary mood by answer- ing a question ”How happy are you at this moment?” on a continuos visual analogue ...
work page 2023
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[46]
I feel joyful, grateful, and full of positive energy
Lately, I’ve been really focused on making good memories and enjoying happy moments with my friends and family. I feel joyful, grateful, and full of positive energy. I think it’s because things have been going my way lately — it’s got me feeling excited and motivated
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[47]
I’m surrounded by people I love, and that really makes me happy
I was feeling elated today — there was so much positivity around me. I’m surrounded by people I love, and that really makes me happy. Work’s been great too; I have awesome colleagues, and we just wrapped up a big project together. I’m excited for what’s next and ready to keep achieving more
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[48]
I’m going out more freely now, with no anxiety, and actually enjoying hanging out with friends
I’ve been in a happy, light mood and feeling really in control. I’m going out more freely now, with no anxiety, and actually enjoying hanging out with friends. I’ve just been feeling good doing all the regular life stuff. Overall, I’m optimistic, content, and hopeful about what’s ahead
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[49]
I also took some time off to focus on myself and just relax
I’ve had a really positive couple of weeks, with good things happening both at work and at home. I also took some time off to focus on myself and just relax. It’s such a nice feeling — I just feel happy and content. D.3.4 NEGATIVE MOOD INDUCTION TRANSCRIPTS
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[50]
It’s been tough — I’ve felt lonely and de- pressed, like something bad is hanging over me
I’ve been feeling really overwhelmed lately. It’s been tough — I’ve felt lonely and de- pressed, like something bad is hanging over me. I can’t even remember the last time I didn’t feel this way
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[51]
I feel like I’m wasting my life. It’s hard to enjoy anything. Everything just seems pointless, and I don’t know how to change it. I’m so tired of getting rejection after rejection with job applications. I keep comparing myself to others, and it makes me feel pathetic. The world just feels like a cold, evil place
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[52]
At work, all I can think about is getting home, and once I’m home, I just want to sleep the day away
I just feel too low to do anything. At work, all I can think about is getting home, and once I’m home, I just want to sleep the day away. Most nights I just vape some weed to try and chill, but the feelings don’t really go away — they’re just always there
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[53]
It was like this wave of sadness hit me, and it hasn’t gone away since
My birthday was supposed to be a happy time with family, but I just felt hollow and empty. It was like this wave of sadness hit me, and it hasn’t gone away since. I feel so hopeless, and even the things I used to love don’t bring me any happiness anymore. 26 D.4 INSTRUCTIONS AND QUESTIONS We report the exact instructions given to participants when respond...
work page 2024
discussion (0)
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