[ PICTOGRAM CASE HISTORY ]

Material Symbols List Alt Add Icon (Outlined). Needs intervention.

Visible referent: list alt add. Intended message: The icon must communicate List Alt Add in a digital interface.. The report separates observed asset evidence, submitted context, and public evidence signals.

0.61

PCS

0.39

CLL

0.48

NTR

[ FEATURED PICTOGRAM ]

Paper

Ink

pictoclarity / material-symbols-list-alt-add-outlined

Output - Material Symbols List Alt Add Icon (Outlined)

Assessing the communicative effectiveness of the List Alt Add icon

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

Mobile appWeb appDesktop app

0.61

PCS

PictoClarity Score

0.39

CLL

Convention Learning Load

0.48

NTR

Neurocognitive Transfer Risk

Read Evidence→

[ HOW THE CASE READS ]

From Input To Public Evidence.

The application stores structured evidence. The public page turns it into a readable pictogram case history.

Submitted Context

Framework output for the Material Symbols List Alt Add icon in the outlined style.

Primary Finding

Primary referent: list alt add.

Metric Reading

Implied function: The icon must communicate List Alt Add in a digital interface..

Public Recommendation

Conduct representative user testing with diverse user groups to validate icon comprehension and reduce confusion risks, especially in contexts without supporting labels or placement cues.

[ EVIDENCE SCREENING ]

What The Estimate Surfaces.

Semantic Transparency Score

Input

Expected

→

Estimated

0.55

Confusion Risk Index

Input

Possible

→

Estimated

0.53

Readability Test Score

Input

Visual

→

Estimated

0.75

PictoClarity Score

Input

Estimated

→

Estimated

0.61

Needs intervention 0.61

The pictogram carries meaningful clarity risk. The estimate applies to this pictogram, this meaning, and this public context.

Last Reviewed

Jun 24, 2026

[ SCORE SCALE ]

The Public Verdict Has A Range.

The level explains the estimated context. It is not a certification.

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

The pictogram works with labels or context.

Pair it with text and monitor interpretation.

0.50-0.64

Needs intervention

Current report

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 Meaning Converges.

The profile compares visual evidence, semantic extraction, cultural recognition, time, and cognitive context. It describes estimated convergence, not universal validity.

Convergent meaning profile

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

Area

0.26

Balance

0.69

Perceptual

0.75

Semantic

0.55

Functional

0.59

Cultural

0.31

Temporal

0.57

Neurocognitive

0.59

Context Independence

0.59

Collective Resonance

0.25

Weakest Axis

Collective Resonance

How strongly public evidence supports shared recognition and persistence.

Strongest Axis

Perceptual Convergence

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

Convergent meaning profile
Axis	Score	Description
Perceptual Convergence	0.75	How strongly visual form survives size, blur, contrast, and detail loss.
Semantic Convergence	0.55	How strongly extracted meaning converges on one interpretation.
Functional Convergence	0.59	How strongly the symbol maps to the intended function.
Cultural Convergence	0.31	How strongly recognition holds across cultural evidence and assumptions.
Temporal Convergence	0.57	How strongly meaning persists over time without semantic decay.
Neurocognitive Convergence	0.59	How strongly the symbol follows AAC pictogram reading: transparent referent, concrete action, low convention load, and support.
Context Independence	0.59	How strongly meaning survives without external labels or placement cues.
Collective Resonance	0.25	How strongly public evidence supports shared recognition and persistence.

Evidence Notes.

8 Findings Published

Evidence

Primary referent: list alt add.

Evidence

Implied function: The icon must communicate List Alt Add in a digital interface..

Evidence

Metaphor type: functional.

Evidence

The icon effectively communicates the intended function of adding an item to a list, with a strong primary referent of 'list alt add' and clear visual elements including three horizontal lines and a plus sign.

Evidence

Visual quality is high, with strong perceptual convergence (0.75) indicating good resilience to size, blur, and contrast changes, supporting usability across devices and contexts.

Evidence

Semantic and functional convergence scores (0.55 and 0.59 respectively) show moderate clarity in meaning and function, but there is some risk of confusion with other add or list icons, especially when labels or context are weak.

Evidence

Cultural convergence is low (0.31), reflecting limited public evidence and recognition outside specific user groups, and a relatively high convention learning load (0.39) suggests users must learn the symbol rather than intuitively understand it.

Evidence

Temporal convergence (0.57) and neurocognitive convergence (0.59) indicate moderate persistence of meaning over time and reasonable alignment with pictogram reading principles, but collective resonance is the weakest axis (0.25), showing limited shared recognition and evidence support.

[ TRANSFER / METRIC CHART ]

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 year	Semantic Transparency	Cultural Evidence
1996	0.77	0.74
1997	0.77	0.74
1998	0.77	0.74
1999	0.77	0.74
2000	0.77	0.75
2001	0.77	0.74
2002	0.77	0.75
2003	0.77	0.75
2004	0.77	0.75
2005	0.77	0.75
2006	0.77	0.75
2007	0.78	0.75
2008	0.78	0.75
2009	0.78	0.75
2010	0.78	0.75
2011	0.78	0.75
2012	0.77	0.75
2013	0.77	0.75
2014	0.77	0.75
2015	0.78	0.75
2016	0.77	0.76
2017	0.77	0.76
2018	0.77	0.76
2019	0.77	0.76
2020	0.77	0.75
2021	0.77	0.75
2022	0.77	0.75
2023	0.28	0.24
2024	0.28	0.24
2025	0.28	0.24
2026	0.28	0.24

Cohort transfer is inactive for this published report. The chart above uses evidence-year or metric data instead.

asset source

Material Symbols list_alt_add 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

historical evidence

Google Books Ngram annual buckets: list

Google Books Ngram / 1996-2026

Annual extraction returned 23148500 records across 27 active years.

Open source

historical evidence

Google Books Ngram annual buckets: add

Google Books Ngram / 1996-2026

Annual extraction returned 21277851 records across 27 active years.

Open source

historical evidence

Google Books Ngram annual buckets: list alt add

Google Books Ngram / 1996-2026

Annual extraction returned 0 records across 0 active years.

Open source

historical evidence

Google Books Ngram annual buckets: symbolic

Google Books Ngram / 1996-2026

Annual extraction returned 20696972 records across 27 active years.

Open source

[ TECHNICAL SCORECARD ]

The Metrics Behind The Case.

PCS

0.61

PictoClarity Score

STS

0.55

Semantic Transparency Score

CRI

0.53

Confusion Risk Index

VRS

0.72

Visual Readability Score

PCH

1.00

Perceptual Cohesion

RTS

0.75

Readability Test Score

SRS

0.70

Scale Robustness Score

BRS

0.84

Blur Robustness Score

TCS

0.78

Target Contrast Stability

SDS

0.74

Stroke Durability Score

SFS

0.65

Silhouette Fidelity Score

NDS

1.00

Negative Detail Score

BBS

0.00

Bounding Box Balance

CPS

1.00

Compression Preservation

PDS

1.00

Pixel Density Suitability

ORS

0.65

Orientation Robustness

CAS

0.60

Color Accessibility Score

RRS

0.39

Referent Recognition Score

FAS

0.57

Functional Association Score

SOS

0.12

Semantic Obsolescence Score

CSS

0.01

Cultural Saturation Score

ERS

0.09

Evidence Reliability Score

MTS

0.28

Metaphor Transfer Score

TDS

0.18

Temporal Decay Score

GDS

0.17

Generational Divide Score

CLL

0.39

Convention Learning Load

NTR

0.48

Neurocognitive Transfer Risk

SPS

0.32

Symbol Persistence Score

OBS

0.19

Obsolescence Signal

CTS

0.00

Cohort Transfer Slope

[ RECOMMENDED NEXT ACTIONS ]

What Improves This Pictogram.

Action

Conduct representative user testing with diverse user groups to validate icon comprehension and reduce confusion risks, especially in contexts without supporting labels or placement cues.

Action

Consider adding or maintaining visible text labels alongside the icon until semantic transparency and cultural recognition are proven through testing.

Action

Enhance contextual cues around the icon in interfaces to reduce misinterpretation, such as grouping with related controls or providing descriptive tooltips.

Action

Monitor evolving cultural and semantic evidence to assess if the icon's recognition improves or declines over time, adjusting design or usage accordingly.

Action

Maintain the icon's visual quality standards to preserve perceptual clarity across device types and display conditions.

[ 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.