Section 264 of 440
Complete canonical tutorial. This reader section contains the same teaching body as PWR-082 · Haptic object recognition. Open the Power dossier.
PWR-082 · SELF GUIDED full tutorial
Identify safe familiar objects by tracing structure before naming them
Haptic recognition combines skin sensation, hand movement and object knowledge. This lesson teaches a repeatable scan: find the outer envelope, edges, material and safe moving parts, then name the object only after describing those features. Sight stays blocked only while seated and handling harmless objects.
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
- Six familiar, clean, blunt, lightweight objects with distinct shapes, such as a spoon, peg, large key ring, sponge, cup and clothes brush.
- An opaque cloth bag or tabletop screen, numbered object labels, timer and record sheet.
- A stable chair and clear table with every object within easy reach.
Before you start
- Inspect every object visually and remove sharp edges, loose parts, residue, allergens and objects that can spill or switch on.
- Choose one hand or declared two-hand method and a 20-second exploration limit.
- Arrange for a helper if reaching into a bag, grip loss or visual blocking could be unsafe.
3 · The method
Follow these steps in order
- Build a safe object set
Choose six known objects that differ in overall form and function. Number them and write the answer key before blocking sight.
Why: Known harmless objects keep the task about recognition, not mystery-object risk.
Check: Every object has a number, name and passed safety check.
- Find the outer envelope
With the object supported on the table, trace its overall length, width and thickness before exploring details.
Why: Global shape sharply narrows the possibilities and reduces aimless squeezing.
Check: You can describe the object as long, round, flat, hollow or another clear form before naming it.
- Trace edges and parts
Follow the perimeter and count handles, corners, openings, curves or branches. Keep fingers moving slowly toward known space.
Why: Relations among parts often identify an object better than texture alone.
Check: The record names at least two parts and how they connect.
- Check material and movement
Describe hard or soft, smooth or rough and flexible or rigid. Move a part only when the object is designed to move and the helper confirmed it is safe.
Why: Material and lawful movement provide extra cues without forcing or damaging the object.
Check: No part is forced, detached or activated.
- State a hypothesis before reveal
Name the object, give confidence from 0 to 100 and cite the two strongest cues. Then look or let the helper reveal it.
Why: Committing first makes feedback informative and separates recognition from post-hoc explanation.
Check: The name, confidence and cues are written before visual confirmation.
- Repair on a new object
For an error, identify the missed cue and apply the full scan to a matched unfamiliar object after at least 24 hours.
Why: A new item tests whether the scan method transfers beyond memorising one set.
Check: The retest log identifies the earlier error and the cue used on the new item.
4 · Worked example
See the whole method used once
Scenario
Lee explores a clean silicone pastry brush hidden behind a tabletop screen.
Walkthrough
- Lee supports the object on the table and finds a long narrow envelope.
- He traces a thicker handle joined to a flat fan-shaped end.
- He notes that the end is soft, flexible and made of many parallel strips.
- He answers pastry brush at 85% confidence, citing handle-plus-flexible-strips.
- After reveal, he later uses the same scan to distinguish an unfamiliar bottle brush from a comb.
Result
The object is correctly identified from connected parts, material and flexibility. The later item shows use of the scan on a new object, not general neurological competence.
5 · Right and wrong
Compare correct or safer execution with the common wrong version
| Moment | Right / safer | Wrong / riskier | Why it matters |
|---|---|---|---|
| Initial contact | Support the object and map its overall form first. | Grab, squeeze and guess from the first texture. | A global-to-local scan exposes diagnostic structure and reduces unsafe manipulation. |
| Moving parts | Move only a known part designed to move. | Twist, open or press an unknown feature to see what happens. | An object can activate, break, spill or pinch. |
| Answer timing | Record a name and cues before reveal. | Peek, then describe why the answer was obvious. | Post-reveal explanations cannot show what supported the original judgement. |
| Transfer | Use a new safe object with related structure. | Repeat the same six objects until the names are automatic. | Repeated-set recall can improve without better haptic analysis. |
6 · Common mistakes
Spot the error and apply the correction
| Mistake | Fix |
|---|---|
| Texture dominates every guess. | Require an outer-form statement and two connected parts before naming. |
| The hand leaves the table and the object drops. | Keep the item supported on a nonslip mat and explore within the table boundary. |
| The learner names several possibilities without committing. | Choose one best hypothesis, confidence and two cues before reveal. |
| Orientation changes between baseline and retest. | Record starting orientation and hand; treat a changed setup as a transfer trial, not a clean repeat. |
7 · Practice
Turn the steps into a usable skill
First session
- Inspect and number six objects with sight.
- Complete two unscored global-to-local scans.
- Run six timed hidden trials with immediate reveal.
- For each miss, write the overlooked structural cue.
- Finish with two new objects if the hand remains comfortable.
Repeat plan
Practise six to eight objects on two sessions per week for two weeks. Replace at least half the set each session and keep the same scan order. Stop before grip fatigue; do not shorten time until accuracy and complete cue descriptions are stable.
Progress when
- Every object is scanned in the declared order, and each correct name cites two features that are truly present.
- The scan proceeds envelope, parts, material, then name without prompting.
- Unfamiliar-object names, cue completeness and errors are reported separately rather than forced through a universal pass count.
Do not progress when
- Objects are guessed from memorised order or sound cues.
- Grip fatigue, pain, numbness or dropping appears.
- The set would need hazardous, unfamiliar or consequential items to become harder.
8 · Check the result
Measure what changed
Correct object identification plus complete structural cue record.
How: Count correct names out of six and separately count trials with an outer-form description, two linked parts and a confidence rating compared with correctness.
Good result: Every object receives a complete envelope–parts–material scan before naming, each name is checked against the key, and the learner shows the named error repair on an unfamiliar object without a safety breach. The number correct is descriptive, not a diagnostic pass score.
This does not prove: It does not diagnose touch-recognition difficulty, establish clinical normality or show superior touch across scales and object classes.
Self-check
- Did you describe overall form before naming?
- Can you point to two connected parts that support the answer?
- Were all moving features known to be safe before movement?
- Does the retest contain objects not present in the first set?
9 · Stop, adapt or get help
Keep the safety boundary practical
Stop and get help
- Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
- Stop immediately if an object is not what the helper expected, has a sharp edge or can activate, spill or break.
- Seek clinical assessment for new difficulty recognising ordinary objects together with weakness, sensory loss, confusion or other neurological change.
Accessibility and adaptations
- Use two hands, a nonslip mat or a helper-held object and record that support.
- Extend exploration time while keeping the same scan order.
- Use larger objects with high-contrast verbal labels for low vision, or sighted exploration when blocking vision is not appropriate.
10 · Evidence and limits
Why these instructions are here
- primary research
Long-term memory for actively touched objects can retain substantial information and can include cross-modal transfer.
Long-Term Memory for Haptically Explored Objects: Fidelity, Durability, Incidental Encoding, and Cross-Modal Transfer - primary research
Haptic shape discrimination depends on object scale and age, so one object set cannot establish general ability.
Aging and haptic shape discrimination: the effects of variations in size
Limits
- Recognition depends on familiarity, size, hand access, starting orientation and time.
- The safe household set does not assess clinical sensory or neurological status.
- A group difference involving blind participants cannot be turned into a biological superiority claim.
Open the complete canonical research register
- Primary empirical supportLimiting / contraryAging and haptic shape discrimination: the effects of variations in size
J. F. Norman; J. M. Dukes; T. N. Palmore · 2020 · Primary research
- Primary empirical supportLimiting / contraryLong-Term Memory for Haptically Explored Objects: Fidelity, Durability, Incidental Encoding, and Cross-Modal Transfer
F. Hutmacher; C. Kuhbandner · 2018 · Primary research
- Primary empirical supportLimiting / contraryMassive cortical reorganization in sighted Braille readers
K. Siuda-Krzywicka; Ł. Bola; M. Paplińska; E. Sumera; K. Jednoróg; A. Marchewka; M. W. Śliwińska; A. Amedi; M. Szwed · 2016 · Primary research
- Limiting / contraryDo Congenitally Blind Individuals have Better Haptic Object Perception Compared to Blindfolded Sighted Individuals?
B. G. Bhirud; L. M. Chandan; A. Chawla · 2016 · Primary research
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.
Build a safe object set
Choose six known objects that differ in overall form and function. Number them and write the answer key before blocking sight.
Known harmless objects keep the task about recognition, not mystery-object risk.
Every object has a number, name and passed safety check.
I’m stuck on this step
Reset: Re-read this authored instruction — “Choose six known objects that differ in overall form and function. Number them and write the answer key before blocking sight.” — and its success check, then attempt only this step.
Possible snag: Texture dominates every guess.
Correction: Require an outer-form statement and two connected parts before naming.
Stop / get help: Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
Find the outer envelope
With the object supported on the table, trace its overall length, width and thickness before exploring details.
Global shape sharply narrows the possibilities and reduces aimless squeezing.
You can describe the object as long, round, flat, hollow or another clear form before naming it.
I’m stuck on this step
Reset: Re-read this authored instruction — “With the object supported on the table, trace its overall length, width and thickness before exploring details.” — and its success check, then attempt only this step.
Possible snag: The hand leaves the table and the object drops.
Correction: Keep the item supported on a nonslip mat and explore within the table boundary.
Stop / get help: Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
Trace edges and parts
Follow the perimeter and count handles, corners, openings, curves or branches. Keep fingers moving slowly toward known space.
Relations among parts often identify an object better than texture alone.
The record names at least two parts and how they connect.
I’m stuck on this step
Reset: Re-read this authored instruction — “Follow the perimeter and count handles, corners, openings, curves or branches. Keep fingers moving slowly toward known space.” — and its success check, then attempt only this step.
Possible snag: The result from “Follow the perimeter and count handles, corners, openings, curves or branches. Keep fingers moving slowly toward known space.” does not yet meet this declared check: The record names at least two parts and how they connect.
Correction: Return to the start of “Trace edges and parts”, reduce complexity or pace, and repeat only the part needed to satisfy: “The record names at least two parts and how they connect.”
Stop / get help: Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
Check material and movement
Describe hard or soft, smooth or rough and flexible or rigid. Move a part only when the object is designed to move and the helper confirmed it is safe.
Material and lawful movement provide extra cues without forcing or damaging the object.
No part is forced, detached or activated.
I’m stuck on this step
Reset: Re-read this authored instruction — “Describe hard or soft, smooth or rough and flexible or rigid. Move a part only when the object is designed to move and the helper confirmed it is safe.” — and its success check, then attempt only this step.
Possible snag: Orientation changes between baseline and retest.
Correction: Record starting orientation and hand; treat a changed setup as a transfer trial, not a clean repeat.
Stop / get help: Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
State a hypothesis before reveal
Name the object, give confidence from 0 to 100 and cite the two strongest cues. Then look or let the helper reveal it.
Committing first makes feedback informative and separates recognition from post-hoc explanation.
The name, confidence and cues are written before visual confirmation.
I’m stuck on this step
Reset: Re-read this authored instruction — “Name the object, give confidence from 0 to 100 and cite the two strongest cues. Then look or let the helper reveal it.” — and its success check, then attempt only this step.
Possible snag: The learner names several possibilities without committing.
Correction: Choose one best hypothesis, confidence and two cues before reveal.
Stop / get help: Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
Repair on a new object
For an error, identify the missed cue and apply the full scan to a matched unfamiliar object after at least 24 hours.
A new item tests whether the scan method transfers beyond memorising one set.
The retest log identifies the earlier error and the cue used on the new item.
I’m stuck on this step
Reset: Re-read this authored instruction — “For an error, identify the missed cue and apply the full scan to a matched unfamiliar object after at least 24 hours.” — and its success check, then attempt only this step.
Possible snag: The result from “For an error, identify the missed cue and apply the full scan to a matched unfamiliar object after at least 24 hours.” does not yet meet this declared check: The retest log identifies the earlier error and the cue used on the new item.
Correction: Return to the start of “Repair on a new object”, reduce complexity or pace, and repeat only the part needed to satisfy: “The retest log identifies the earlier error and the cue used on the new item.”
Stop / get help: Stop for hand pain, cramping, new numbness, tremor, dropping or skin irritation.
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.
Support the object and map its overall form first.
Grab, squeeze and guess from the first texture.
Move only a known part designed to move.
Twist, open or press an unknown feature to see what happens.
Record a name and cues before reveal.
Peek, then describe why the answer was obvious.
Use a new safe object with related structure.
Repeat the same six objects until the names are automatic.
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.