thirst
Enable an agent to recognise and track thirst as an experienced motivation to drink, distinguish it from related states, and identify appropriate responses without inferring hydration status from thirst alone.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise and track thirst as an experienced motivation to drink, distinguish it from related states, and identify appropriate responses without inferring hydration status from thirst alone.
Thirst is the conscious sensation of needing or wanting to drink, arising principally from the regulation of body-fluid concentration and circulating volume and modified by oral sensations, ingestion, and learned cues.
It can be Elicit a thirst report that separates intensity, sensory qualities, and beverage preference.; Track an episode using consistently anchored assessments.; Link thirst to contextual observations while labelling causal uncertainty.; Identify practical barriers to obtaining or consuming a drink.; Compare reported thirst before and after drinking.; Flag persistent, unusual, or difficult-to-interpret reports for human review under an applicable care protocol..
Distinguishing features
An instance involves an experienced need or urge to drink; observing fluid consumption alone does not establish thirst.
A report of mouth dryness requires a separate question about the urge to drink before it is classified as thirst.
Wanting the taste, stimulation, or social experience of a particular beverage does not by itself establish thirst.
Thirst intensity and independently assessed hydration status must be recorded separately rather than treated as interchangeable measurements.
The intended relief concerns a bodily drinking-related experience; metaphorical uses of 'thirst' fall outside this model.
Scope
+ Episodes of felt thirst and their reported intensity and qualities
+ The distinction between thirst, dry mouth, beverage craving, and habitual drinking
+ Possible eliciting conditions and their evidential status
+ Motivation to drink and barriers to acting on it
+ Changes in thirst before, during, and after drinking
- Hydration status and fluid balance as independently assessed physiological states
- Diagnosis and treatment of conditions associated with unusual thirst
- Water supply infrastructure and drinking-water quality
- Beverage composition, nutrition, and metabolism
- Metaphorical thirst for knowledge, power, or other non-beverage objects
Characteristics
- Reported thirst intensity
- Score on an explicitly identified scale, including anchors and assessment time Supports comparison within an episode while preserving differences between measurement instruments.
- Experiential qualities
- Participant wording plus optional tags: urge to drink, mouth dryness, throat sensation, other, unclear Preserves how thirst is experienced without reducing it to one sensation.
- Episode course
- Newly noticed, increasing, stable, decreasing, reportedly relieved, recurrent, unknown Distinguishes momentary ratings from the trajectory of the experience.
- Reporting basis
- Contemporaneous self-report, retrospective self-report, proxy interpretation, behavioural inference, unavailable Prevents an inference about thirst from being presented as a directly reported experience.
- Candidate eliciting conditions
- Links to preceding or concurrent conditions, each marked as reported attribution, observed association, or supported explanation Allows investigation of causes without turning temporal coincidence into a causal finding.
- Drink access and constraints
- Links to available drinks, assistance needs, access barriers, and applicable care instructions Explains why a person may remain thirsty without drinking.
- Reported relief
- Change on the same thirst scale, with elapsed time and associated drinking event recorded Tracks perceived response without equating relief with physiological restoration.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.thirst
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 14 findings · 22 questions.
Thirst experience and boundaries Establishes which experience is being called thirst and how neighbouring experiences are distinguished.
The registry has no definition, so recognition requires an explicit working sense and boundary tests.
Felt need to drink
Records the person's account of the bodily experience and its orientation toward drinking.
Literal thirst instance
Represent the reported experience before assigning a mechanism or inferring it from behaviour.
- Does the person describe a bodily need or urge to drink, and what words do they use? definition
- Is this account a direct report, a retrospective recollection, or another observer's interpretation? provenance
Neighbouring experiences
Separates thirst from mouth dryness, beverage-specific desire, and nonliteral language.
Dryness and desire separation
Keep co-occurring sensations and preferences distinct instead of using them as substitutes for thirst.
- Is mouth dryness present, and is an urge to drink reported separately? boundary
- Is the person seeking bodily relief, a particular beverage experience, or both? boundary
Thirst assessment and course Captures the strength and development of thirst while retaining measurement limitations.
An agent needs to distinguish a transient sensation from a persistent or recurring experience using interpretable observations.
Intensity assessment
Defines how thirst is elicited, scored, and compared.
Anchored thirst report
Attach scale wording, anchors, timing, and reporting method to each intensity value.
- Which question and scale anchors were used to assess thirst intensity? measurement
- Can the person use this assessment method, and what communication support or proxy interpretation was involved? provenance
Episode timing
Tracks onset, persistence, recurrence, and interruptions in observation.
Thirst trajectory
Represent change over time without treating missing reports as an absence of thirst.
- When was thirst first noticed, and how has its reported intensity changed since then? measurement
- Does the record describe continuous thirst, separate recurring episodes, or observations too sparse to distinguish them? boundary
Eliciting context and physiological links Connects the experience to potentially relevant events and independently assessed bodily states.
Thirst invites physiological explanations, but the model must separate contextual evidence from established causes.
Preceding and concurrent conditions
Records the circumstances surrounding thirst without presuming they explain it.
Candidate thirst elicitors
Capture relevant timing of drinking, eating, exertion, environmental exposure, and other reported changes as candidate context.
- What drinking, eating, activity, environmental exposure, or other changes preceded the report of thirst? provenance
- Which proposed explanation comes from the person, which from an observer, and which has independent supporting evidence? provenance
Hydration evidence boundary
Links to physiological assessments while retaining thirst as a separately measured experience.
Experience versus fluid state
Do not use a thirst report or its absence as a complete assessment of hydration.
- What independent assessment of hydration or fluid balance is available, and when was it obtained relative to the thirst report? measurement
- What conclusions remain unsupported if the only available evidence is the person's thirst rating? boundary
Drinking response and relief Represents how thirst motivates action, what limits that action, and how the experience subsequently changes.
Recognising thirst is useful only if the agent can distinguish willingness, opportunity, drinking behaviour, and reported relief.
Acting on thirst
Records intended drinking and the practical or care-related constraints on responding.
Drink intention and access
Separate wanting to drink from being able to obtain and consume a drink.
- Does the person want to drink now, and what prevents or delays them from doing so? action
- What assistance or response is appropriate given their preferences and any documented care instructions? action
Post-drinking experience
Tracks perceived relief, persistence, and recurrence after a recorded response.
Relief and unresolved thirst
Associate drinking events with subsequent reports without assuming that either drinking or relief settles physiological needs.
- What was consumed, when, and how did thirst change at explicitly recorded follow-up times? measurement
- If thirst persists or recurs unusually for this person, what applicable protocol determines whether human review is needed? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The sense assumed here is physiological thirst, not metaphorical longing.
- The listed kinds distinguish mechanisms and contexts; they overlap and are not a single exhaustive classification.
- Rating-scale ranges describe instrument formats, not normal physiological ranges; exact instruments and anchors require verification.
- Which of these check these first hold for the sense of thirst this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Osmotic thirst, stimulated by increased effective concentration of body fluids
- Hypovolemic thirst, stimulated by reduced circulating fluid volume
- Prandial thirst, associated with eating
- Which of these kinds and varieties hold for the sense of thirst this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Motivating drinking to maintain fluid balance
- Assessing subjective symptoms during clinical history-taking
- Studying fluid regulation and drinking behaviour
- Monitoring perceived hydration needs during exercise and heat exposure
- Which of these real-world use hold for the sense of thirst this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Subjective thirst intensity - 0-10 on a numerical rating scale; wording and anchors depend on the instrument - dimensionless rating
- Subjective thirst intensity - 0-100 on a 100 mm visual analogue scale, commonly anchored by no thirst and extreme thirst - mm
- Which of these typical measurements hold for the sense of thirst this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Impaired or absent thirst can allow fluid deficits to develop without a strong desire to drink.
- Persistent excessive thirst can accompany disturbances of fluid balance or metabolism, but is not specific to one cause.
- Drinking substantially beyond water-excretion capacity can cause hyponatraemia.
- Dry mouth can increase perceived need to drink without indicating a corresponding whole-body water deficit.
- Thirst intensity alone does not reliably quantify dehydration.
- Which of these failure modes and hazards hold for the sense of thirst this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Dehydration - Dehydration is a body-water deficit; thirst is a subjective sensation, and either can occur without the other.
- Dry mouth - Dry mouth is perceived oral dryness; thirst concerns the desire or need to drink.
- Polydipsia - Polydipsia denotes excessive thirst or drinking in clinical usage; ordinary thirst need not be excessive.
- Drinking - Drinking is the behaviour of ingesting liquid; thirst is a sensation that can motivate that behaviour.
- Salt appetite - Salt appetite motivates sodium intake specifically; thirst primarily motivates fluid intake.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of thirst this model covers, and on what evidence? provenance
What the second pass must settle
- Which definitions in physiology, psychology, and clinical assessment best distinguish thirst as conscious sensation from thirst as motivation to drink?
- Which thirst assessment instruments are supported for the intended populations, languages, and communication abilities?
- How should thirst be represented in nonverbal humans or nonhuman animals when evidence is behavioural rather than directly reported?
- What evidence supports distinguishing particular sensory qualities or eliciting mechanisms as subtypes rather than contextual attributes?
- Which population-specific protocols and individual baselines should govern review of persistent or unusual thirst without embedding diagnosis in this model?