Section 267 of 440
Complete canonical tutorial. This reader section contains the same teaching body as PWR-085 · Olfactory discrimination. Open the Power dossier.
PWR-085 · SELF GUIDED full tutorial
Separate aroma identity, quality and intensity using only familiar safe foods
Smell discrimination means telling declared aromas or aroma features apart. The safest route uses written descriptor cards with no exposure. An optional practical route uses only two or three labelled foods or drinks that the learner already consumes safely, in a ventilated room, with one brief ordinary sniff. The task never uses essential oils, fragrances, cleaners, smoke, spoiled food or unknown substances.
1 · Permission and limits
Know exactly what you may do
2 · Get ready
Gather what you need and check the starting conditions
What you need
- No-exposure packet of ten cards, two for each field: identity (‘coffee’, ‘black tea’), quality (‘roasted’, ‘woody’), intensity (‘2 of 5’, ‘very strong’), familiarity (‘smelled most mornings’, ‘new to me’) and liking (‘pleasant’, ‘disliked’). Print the correct field on each card back.
- Optional practical packet: three separate closed containers holding labelled familiar foods or drinks already used safely.
- A helper-made code key, timer and sheet with identity, quality, intensity, familiarity, liking and confidence fields.
- A ventilated room with an immediate way to close containers and leave.
Before you start
- Use the no-exposure route if there is asthma, allergy, migraine, nausea, pregnancy-related sensitivity, recent smell change or any uncertainty about exposure.
- Confirm labels, ingredients, freshness and ordinary safe use; do not ask the learner to ingest anything.
- Keep all containers closed except the one in use and agree a stop signal.
3 · The method
Follow these steps in order
- Choose the safe route
Select descriptor cards only, or select two or three labelled familiar foods already handled without trouble. Write the choice and reason.
Why: A deliberate route choice prevents curiosity from turning into an exposure challenge.
Check: The sheet states no-exposure or familiar-aroma and lists every permitted item.
- Separate smell dimensions
Before any trial, define identity, quality, intensity, familiarity and liking in separate columns.
Why: Aroma identity is not the same as strength, pleasantness or personal memory.
Check: The learner can give a different example answer for each column.
- Code a balanced set
For the no-exposure route, shuffle the ten supplied cards face down; turn one at a time without viewing the answer on its back. For the practical route, a helper assigns hidden letter codes and prepares nine trials with each familiar item appearing equally often. Product labels stay available for safety.
Why: Balanced coding allows feedback without turning the substance into a mystery.
Check: Card answers or aroma identities remain hidden until the learner commits a field or identity, while every practical ingredient label remains visible.
- Take one ordinary sniff
On the practical route, open one container at a comfortable ordinary distance, take one brief natural sniff without deep inhalation and close it immediately. On the card route, read one printed phrase once; there is no container or exposure.
Why: Long or repeated inhalation increases exposure and adaptation, which can dull later trials.
Check: A practical container is open for one ordinary sniff only, or one card phrase is read once; no extra exposure is introduced.
- Record before reveal
For practical aroma, choose the identity label and then record quality, intensity, familiarity, liking and confidence. For a card, choose exactly one of those five field headings and explain which word makes it fit. Commit before viewing the key.
Why: Separate pre-feedback fields show whether a correct label came with calibrated confidence and what feature was perceived.
Check: The practical row or card-field choice and reason are saved before the answer is checked.
- Space, reveal and transfer
For practical aroma, wait at least one minute in fresh room air, reveal the code and note the missed cue; after 48 hours repeat six trials with changed containers or order, never stronger aromas. For cards, reveal each back after commitment, record any confused field and re-sort the same ten cards after 48 hours in a new order.
Why: Spacing limits adaptation; a changed arrangement tests recognition beyond the original sequence.
Check: Practical identity or card-field retest results are recorded separately from the first set, with exposure symptoms marked not applicable on the card route.
4 · Worked example
See the whole method used once
Scenario
Ana routinely and safely uses ground coffee, dry black tea and cinnamon oatmeal; each remains in its original labelled container.
Walkthrough
- A helper checks labels and codes nine balanced trials while Ana reads every ingredient list.
- Ana opens code B, takes one normal sniff from a comfortable distance and closes it.
- She selects tea, writes woody/dry, intensity 2/5, familiar 5/5, liking 3/5 and confidence 70%.
- The key confirms tea, and she waits in fresh air before the next trial.
- Two days later the helper changes the jars and order; Ana completes six trials without a deeper sniff.
Result
Ana distinguishes the declared familiar aromas under this setup and keeps quality, intensity and liking separate. The result does not measure a clinical threshold or prove environmental hazard detection.
5 · Right and wrong
Compare correct or safer execution with the common wrong version
| Moment | Right / safer | Wrong / riskier | Why it matters |
|---|---|---|---|
| Material choice | Use original-labelled routine foods or descriptor cards. | Use an unlabeled oil or cleaning liquid because its smell is distinctive. | Unknown and concentrated substances create avoidable exposure risk. |
| Sniff | Take one brief natural sniff at a comfortable distance. | Inhale deeply or repeat until certain. | Stronger exposure can trigger symptoms and adaptation. |
| Scoring | Score identity separately from intensity and liking. | Call a disliked or faint aroma an incorrect identity. | These are distinct perceptual and evaluative dimensions. |
| Safety claim | Keep smoke, gas and food-safety alarms and checks. | Use a good practice score to trust the nose around hazards. | Olfactory task performance cannot certify that an environment or food is safe. |
6 · Common mistakes
Spot the error and apply the correction
| Mistake | Fix |
|---|---|
| All containers stay open. | Open only the current one and close it immediately after one sniff. |
| The helper hides ingredient labels with the code. | Keep safety labels visible; hide only the answer mapping. |
| Intensity is increased after an error. | Change order or container on retest, never concentration or sniff depth. |
| Liking is recorded as accuracy. | Use a separate identity answer and score liking independently. |
7 · Practice
Turn the steps into a usable skill
First session
- Choose the no-exposure or familiar-aroma route.
- Learn the five separate response fields.
- Complete three unscored descriptor examples.
- Run up to nine spaced practical trials or sort all ten no-exposure cards.
- Close all containers and review symptoms before scoring.
Repeat plan
Use no more than one short session on a day and two sessions in a week. Keep items ordinary and familiar, change only code order or containers, and include a six-trial delayed set after 48 hours. Stop practical exposure if comfort changes.
Progress when
- Practical identity errors or no-exposure card-field errors are reported across two matched sets and corrected from the hidden key.
- The learner uses one sniff and full spacing without prompting.
- Identity, intensity, familiarity and liking remain separate.
Do not progress when
- Any symptom, aversion or anxiety rises.
- The proposed next item is concentrated, unknown, non-food or not routinely tolerated.
- There is a new smell loss, distortion or phantom smell needing clinical review.
8 · Check the result
Measure what changed
Correct identity among a declared set of familiar aromas.
How: Count correct identity choices out of balanced trials; report confidence calibration, intensity ratings and any symptom separately. For card-only practice, score correct separation of the five dimensions.
Good result: On practical aroma trials, every identity is committed before reveal and delayed errors stay visible; on cards, every phrase is assigned to the key’s field with any confusion corrected. Both routes keep identity, quality, intensity, familiarity and liking separate, and no accuracy cutoff is treated as a clinical smell threshold.
This does not prove: It does not establish a clinical smell threshold, recovery from smell loss, hazard detection, diagnosis or general transfer.
Self-check
- Are all practical items labelled, familiar and already used safely?
- Did each trial use only one normal sniff?
- Can you show separate identity, intensity and liking scores?
- Did the retest change order rather than exposure strength?
9 · Stop, adapt or get help
Keep the safety boundary practical
Stop and get help
- Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
- Do not practise during a new smell loss or distortion, after head injury, or when smells occur without a source; seek appropriate clinical advice.
- Discard any food that is spoiled, contaminated, unlabelled or outside normal safe storage.
Accessibility and adaptations
- Use large-print, pictorial or spoken labels while keeping ingredients available.
- A helper may handle containers and write responses while the learner controls distance and stop signal.
- Use the descriptor-card route for anyone who cannot or does not want to receive an aroma exposure.
10 · Evidence and limits
Why these instructions are here
- primary research
A randomised double-blind trial found olfactory training was not superior to placebo for COVID-19-related smell loss, so no universal treatment effect is claimed.
Olfactory training for the treatment of COVID-19 related smell loss: a randomised double-blind controlled trial - official guidance
Official NIDCD guidance treats smell disorders as varied conditions that may affect safety and merit appropriate clinical evaluation.
Smell (Olfactory) Disorders
Limits
- Only familiar routine food aromas are used; this is not threshold training.
- Environmental and food safety must never depend on this score.
- Condition-specific clinical evidence cannot be transferred to healthy learners or every cause of smell change.
Open the complete canonical research register
- Primary empirical supportLimiting / contraryOlfactory training is helpful in postinfectious olfactory loss: a randomized, controlled, multicenter study
M. Damm; L. K. Pikart; H. Reimann; S. Burkert; Ö. Göktas; B. Haxel; S. Frey; I. Charalampakis; A. Beule; B. Renner; T. Hummel; K.-B. Hüttenbrink · 2014 · Primary research
- Primary empirical supportLimiting / contraryOlfactory Training in Post-Traumatic Smell Impairment: Mild Improvement in Threshold Performances: Results from a Randomized Controlled Trial
C. Langdon; E. Lehrer; J. Berenguer; S. Laxe; I. Alobid; L. Quintó; F. Mariño-Sánchez; M. Bernabeu; C. Marin; J. Mullol · 2018 · Primary research
- Limiting / contraryOlfactory training for the treatment of COVID-19 related smell loss: a randomised double-blind controlled trial
T. L. I. Serrano; M. A. Antonio; L. T. Giacomin; A. M. Morcillo; J. Dirceu Ribeiro; E. Sakano · 2025 · Primary research
- Limiting / contraryOfficial boundary contextSmell (Olfactory) Disorders
U.S. National Institute on Deafness and Other Communication Disorders · 2026 · Official guidance
Read the complete evidence interpretation on the Power dossier.
Tutorial delivery controls
Learn, adapt, troubleshoot and resume
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Step-by-step learner mode
Each activity includes its success check, a nearby accessible alternative and an “I’m stuck” correction path. Alternatives preserve the target where possible; when they change the task, Titan labels them as related rather than equivalent.
Choose the safe route
Select descriptor cards only, or select two or three labelled familiar foods already handled without trouble. Write the choice and reason.
A deliberate route choice prevents curiosity from turning into an exposure challenge.
The sheet states no-exposure or familiar-aroma and lists every permitted item.
I’m stuck on this step
Reset: Re-read this authored instruction — “Select descriptor cards only, or select two or three labelled familiar foods already handled without trouble. Write the choice and reason.” — and its success check, then attempt only this step.
Possible snag: The result from “Select descriptor cards only, or select two or three labelled familiar foods already handled without trouble. Write the choice and reason.” does not yet meet this declared check: The sheet states no-exposure or familiar-aroma and lists every permitted item.
Correction: Return to the start of “Choose the safe route”, reduce complexity or pace, and repeat only the part needed to satisfy: “The sheet states no-exposure or familiar-aroma and lists every permitted item.”
Stop / get help: Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
Separate smell dimensions
Before any trial, define identity, quality, intensity, familiarity and liking in separate columns.
Aroma identity is not the same as strength, pleasantness or personal memory.
The learner can give a different example answer for each column.
I’m stuck on this step
Reset: Re-read this authored instruction — “Before any trial, define identity, quality, intensity, familiarity and liking in separate columns.” — and its success check, then attempt only this step.
Possible snag: Liking is recorded as accuracy.
Correction: Use a separate identity answer and score liking independently.
Stop / get help: Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
Code a balanced set
For the no-exposure route, shuffle the ten supplied cards face down; turn one at a time without viewing the answer on its back. For the practical route, a helper assigns hidden letter codes and prepares nine trials with each familiar item appearing equally often. Product labels stay available for safety.
Balanced coding allows feedback without turning the substance into a mystery.
Card answers or aroma identities remain hidden until the learner commits a field or identity, while every practical ingredient label remains visible.
I’m stuck on this step
Reset: Re-read this authored instruction — “For the no-exposure route, shuffle the ten supplied cards face down; turn one at a time without viewing the answer on its back. For the practical route, a helper assigns hidden letter codes and prepares nine trials with each familiar item appearing equally often. Product labels stay available for safety.” — and its success check, then attempt only this step.
Possible snag: The helper hides ingredient labels with the code.
Correction: Keep safety labels visible; hide only the answer mapping.
Stop / get help: Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
Take one ordinary sniff
On the practical route, open one container at a comfortable ordinary distance, take one brief natural sniff without deep inhalation and close it immediately. On the card route, read one printed phrase once; there is no container or exposure.
Long or repeated inhalation increases exposure and adaptation, which can dull later trials.
A practical container is open for one ordinary sniff only, or one card phrase is read once; no extra exposure is introduced.
I’m stuck on this step
Reset: Re-read this authored instruction — “On the practical route, open one container at a comfortable ordinary distance, take one brief natural sniff without deep inhalation and close it immediately. On the card route, read one printed phrase once; there is no container or exposure.” — and its success check, then attempt only this step.
Possible snag: All containers stay open.
Correction: Open only the current one and close it immediately after one sniff.
Stop / get help: Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
Record before reveal
For practical aroma, choose the identity label and then record quality, intensity, familiarity, liking and confidence. For a card, choose exactly one of those five field headings and explain which word makes it fit. Commit before viewing the key.
Separate pre-feedback fields show whether a correct label came with calibrated confidence and what feature was perceived.
The practical row or card-field choice and reason are saved before the answer is checked.
I’m stuck on this step
Reset: Re-read this authored instruction — “For practical aroma, choose the identity label and then record quality, intensity, familiarity, liking and confidence. For a card, choose exactly one of those five field headings and explain which word makes it fit. Commit before viewing the key.” — and its success check, then attempt only this step.
Possible snag: The result from “For practical aroma, choose the identity label and then record quality, intensity, familiarity, liking and confidence. For a card, choose exactly one of those five field headings and explain which word makes it fit. Commit before viewing the key.” does not yet meet this declared check: The practical row or card-field choice and reason are saved before the answer is checked.
Correction: Return to the start of “Record before reveal”, reduce complexity or pace, and repeat only the part needed to satisfy: “The practical row or card-field choice and reason are saved before the answer is checked.”
Stop / get help: Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
Space, reveal and transfer
For practical aroma, wait at least one minute in fresh room air, reveal the code and note the missed cue; after 48 hours repeat six trials with changed containers or order, never stronger aromas. For cards, reveal each back after commitment, record any confused field and re-sort the same ten cards after 48 hours in a new order.
Spacing limits adaptation; a changed arrangement tests recognition beyond the original sequence.
Practical identity or card-field retest results are recorded separately from the first set, with exposure symptoms marked not applicable on the card route.
I’m stuck on this step
Reset: Re-read this authored instruction — “For practical aroma, wait at least one minute in fresh room air, reveal the code and note the missed cue; after 48 hours repeat six trials with changed containers or order, never stronger aromas. For cards, reveal each back after commitment, record any confused field and re-sort the same ten cards after 48 hours in a new order.” — and its success check, then attempt only this step.
Possible snag: Intensity is increased after an error.
Correction: Change order or container on retest, never concentration or sniff depth.
Stop / get help: Close the container, move to fresh air and stop for wheeze, breathing trouble, swelling, hives, faintness, severe headache, nausea or distress; use emergency help for severe allergic or breathing symptoms.
Correct versus incorrect execution
These accessible process diagrams are built from the tutorial’s own right/wrong teaching. They are not anatomical illustrations and do not add technique beyond the canonical tutorial.
Use original-labelled routine foods or descriptor cards.
Use an unlabeled oil or cleaning liquid because its smell is distinctive.
Take one brief natural sniff at a comfortable distance.
Inhale deeply or repeat until certain.
Score identity separately from intensity and liking.
Call a disliked or faint aroma an incorrect identity.
Keep smoke, gas and food-safety alarms and checks.
Use a good practice score to trust the nose around hazards.
Method-structure checklist
10 of 10 structural checks present
- Ordered, Power-specific instructions — present
- Every activity has a success check — present
- Materials or supplied records are declared — present
- Measurement or assessment rule is present — present
- Tutorial-specific troubleshooting is present — present
- Stopping or escalation boundary is present — present
- Every activity has an adjacent alternative — present
- Correct-versus-incorrect comparison is present — present
- Evidence context is bound to the Power record — present
- Planning metadata is present — present
The method-readiness band and presence checklist assess tutorial presentation and are separate from evidence quality for the underlying Power. They are automated editorial aids, not human approval.
Manual editorial sign-off: Pending. This tutorial must not display a human-approved state until an identified editor signs the exact content hash.