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FrameworkMetric vocabulary, limits, and screening structure.ReportsReviewed public case histories and score interpretation.CasesEditorial comparisons built from reviewed public reports.Icon setsCanonical provider coverage linked to public reports.Public-service contextOne high-risk coverage context for shared icon decisions.AboutProject origin, creator, and operating boundaries.

[ Product ]

FigmaCanvas asset intake into private PictoClarity drafts.VerifierLocal Markdown snapshot hash verification.AppPrivate report request workspace.

[ PICTOGRAM CASE HISTORY ]

Material Symbols Mail Lock.

Sharp icon

Usable with support

Visible referent: mail lock. Intended message: The icon must communicate Mail Lock in a digital interface. This Material Symbols asset uses the Sharp style in default interface contexts.

0.66

PCS

0.37

CLL

0.40

NTR

[ Style variants ]

pictoclarity / material-symbols-mail-lock

OutlinedUsable with supportRoundedUsable with supportSharpUsable with support

[ Diagnostic output ]

First read the submitted symbol.

0.66 PCS · 0-1 higher is clearer

The report starts with the visible asset, intended message, score, and context. The estimate stays scoped to this case.

Pictogram contrast preview
Paper
Ink

pictoclarity / material-symbols-mail-lock-sharp

Output - Material Symbols Mail Lock Icon (Sharp)

Assessing the communicative effectiveness of the Mail Lock icon

This reviewed catalog report estimates clarity for Mail Lock in default interface contexts. Scores are screening estimates and do not replace user testing.

Mobile appWeb appDesktop app

0.66

PCS

PictoClarity Score

0.37

CLL

Convention Learning Load

0.40

NTR

Neurocognitive Transfer Risk

Read case interpretation→Markdown version

[ CASE INTERPRETATION ]

How the report reads.

Usable with support

0.66

0-1 scale; higher is clearer. Support.

The pictogram works with labels or context. It applies to this pictogram, this meaning, and this public context.

[ Report trace ]

Evidence stays attached from input to support.

Context first. Score second. Support last.

01

Submitted context

Framework output for the Material Symbols Mail Lock icon in the sharp style.

02

Observed referent

Primary referent: mail lock.

03

Estimate driver

Implied function: The icon must communicate Mail Lock in a digital interface..

04

Recommended support

Run representative user testing before publication.

[ METRIC DRIVERS ]

What changes the estimate.

Semantic Transparency Score

Input

Expected

→

Estimated

0.60

0-1 scale; higher is clearer. Support.

Confusion Risk Index

Input

Possible

→

Estimated

0.48

0-1 scale; higher is clearer. Intervention.

Readability Test Score

Input

Visual

→

Estimated

0.77

0-1 scale; higher is clearer. Strong.

PictoClarity Score

Input

Estimated

→

Estimated

0.66

0-1 scale; higher is clearer. Support.

Usable with support 0.66

0-1 scale; higher is clearer. Support.

The pictogram works with labels or context. This level is scoped to the submitted meaning, visual asset, and public-use context.

Last Reviewed

Jul 06, 2026

[ Score scale ]

How to read the level.

Usable with support

The label names screening risk for this context. It is not a certification or a measured comprehension rate.

0.80-1.00

Strong clarity

The pictogram communicates well in this context.

Use it, then keep testing with real users.

0.65-0.79

Usable with support

Current report

The pictogram works with labels or context.

Pair it with text and monitor interpretation.

0.50-0.64

Needs intervention

The pictogram carries meaningful clarity risk.

Improve the symbol before relying on it.

0.00-0.49

Not reliable

The pictogram does not communicate enough alone.

Replace it or add strong alternative support.

[ CONVERGENCE PROFILE ]

Where evidence agrees.

The profile compares visual evidence, semantic extraction, cultural recognition, time, and cognitive context. It shows agreement between signals, not universal validity.

Convergent meaning profile

The radar shows where meaning converges. It does not certify universal validity.

Area

0.33

Balance

0.81

Perceptual

0.75

Semantic

0.60

Functional

0.60

Cultural

0.48

Temporal

0.45

Neurocognitive

0.64

Context Independence

0.63

Collective Resonance

0.48

Weakest Axis

Temporal Convergence

How strongly meaning persists over time without semantic decay.

Strongest Axis

Perceptual Convergence

How strongly visual form survives size, blur, contrast, and detail loss.

Convergent meaning profile
AxisScoreDescription
Perceptual Convergence0.75How strongly visual form survives size, blur, contrast, and detail loss.
Semantic Convergence0.60How strongly extracted meaning converges on one interpretation.
Functional Convergence0.60How strongly the symbol maps to the intended function.
Cultural Convergence0.48How strongly recognition holds across cultural evidence and assumptions.
Temporal Convergence0.45How strongly meaning persists over time without semantic decay.
Neurocognitive Convergence0.64How strongly the symbol follows AAC pictogram reading: transparent referent, concrete action, low convention load, and support.
Context Independence0.63How strongly meaning survives without external labels or placement cues.
Collective Resonance0.48How strongly public evidence supports shared recognition and persistence.

Cultural axis

0.48

Recognition depends on cultural exposure and prior assumptions, so shared understanding is weaker than visual recognition alone suggests.

Temporal axis

0.45

Meaning weakens over time when the source object or function is less present in everyday use.

Evidence floor

0.49

Public evidence is thin or unavailable for display, so the cultural reading stays cautious.

[ Published findings ]

What the case evidence says.

6 findings

Findings summarize the public reading for this pictogram. They do not replace user testing.

Finding 01

Primary referent: mail lock.

Finding 02

Implied function: The icon must communicate Mail Lock in a digital interface..

Finding 03

Metaphor type: functional.

Finding 04

Functional meaning: The icon must communicate Mail Lock in a digital interface..

Finding 05

PCS total: 0.66.

Finding 06

Weakest convergence axis: Temporal Convergence.

[ Public evidence ]

Public evidence trend

The chart shows public evidence buckets by evidence year. Cohort breakpoints appear only when an aging referent is active.

Public evidence trend

Evidence year: 2026

Evaluation

Reference point.

X axis: Evidence year

Public evidence trend
Evidence yearSemantic TransparencyCultural Evidence
19960.700.67
19970.780.76
19980.760.73
19990.720.70
20000.760.74
20010.740.71
20020.720.70
20030.700.67
20040.550.54
20050.540.54
20060.740.71
20070.750.72
20080.760.74
20090.730.70
20100.740.72
20110.700.68
20120.690.67
20130.570.57
20140.690.67
20150.570.58
20160.720.70
20170.700.68
20180.720.70
20190.720.70
20200.720.70
20210.700.68
20220.720.70
20230.600.60
20240.600.59
20250.600.59
20260.570.56
Cohort transfer is not active for this published report. The chart above uses evidence-year or metric data instead.

Evidence note

External evidence not used for public claims

Some external references were not relevant enough to support public cultural or trend claims. Omitted: OpenAlex annual evidence: mail lock icon comprehension; Crossref annual evidence: mail lock icon comprehension.

asset source

Material Symbols mail_lock SVG

Material Symbols by Google

Unofficial clarity analysis. PictoClarity is not affiliated with, endorsed by, or sponsored by Google. Material Symbols are provided by Google under their published license.

Open source

[ Metric scorecard ]

The scores behind the reading.

30 metrics

Each metric explains one pressure point. The composite score uses these signals together.

PCS

Driver

0.66

0-1 scale; higher is clearer. Support.

PictoClarity Score

Why it matters

The composite score is pulled down by confusion risk and weak public evidence.

model-estimated / derived

STS

0.60

0-1 scale; higher is clearer. Support.

Semantic Transparency Score

model-estimated / independent

CRI

Driver

0.48

0-1 scale; lower is safer. Watch.

Confusion Risk Index

Why it matters

The intended meaning can compete with nearby readings, especially when the icon appears without a text label.

model-estimated / derived

VRS

0.74

0-1 scale; higher is clearer. Support.

Visual Readability Score

measured / independent

PCH

1.00

0-1 scale; higher is clearer. Strong.

Perceptual Cohesion

measured / independent

RTS

0.77

0-1 scale; higher is clearer. Strong.

Readability Test Score

measured / independent

SRS

0.70

0-1 scale; higher is clearer. Support.

Scale Robustness Score

measured / independent

BRS

0.84

0-1 scale; higher is clearer. Strong.

Blur Robustness Score

measured / independent

TCS

0.78

0-1 scale; higher is clearer. Strong.

Target Contrast Stability

measured / independent

SDS

0.74

0-1 scale; higher is clearer. Support.

Stroke Durability Score

measured / independent

[ RECOMMENDED SUPPORT ]

What to test next.

Recommendation

Run representative user testing before publication.

Recommendation

Keep the text label visible until semantic transparency is proven.

Recommendation

Keep visible label support when scores sit below strong clarity.

Recommendation

Validate interpretation with representative users before high-risk release.

[ Private testing / Admin invite ]

Request an invite for pictogram clarity screening.

Access stays invite-only during private testing.

Requests feed the admin invite queue.

Useful context helps select early pilots.