russellbarkley.org

https://russellbarkley.org· First analyzed 31 May 2026· Updated 31 May 2026

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russellbarkley.org

Mobile

Sponsored

Hosting Provider

LiquidNet US LLC

IP Address

198.23.50.12

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Coral Springs, United States

ASN

AS14555

Organization

LiquidNet US LLC

Server

Apache

Nameservers

dns1.supremecenter26.com.dns2.supremecenter26.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

464 ms10%

Speed Index

603 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

734 KB

15 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

LiquidNet US LLC

Technology Stack

2 Technologies Detected

Analytics

Facebook Pixel

Web Servers

Apache

SEO Analysis

F34/100

Meta Tags7/15

Content7/12

Headings0/8

Technical5/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

russellbarkley.orgrussellbarkley.org

Dr. Russell A. Barkley - Dedicated to Education and Research on ADHD

No description available for this page.

Title Length68 chars

Recommended: 50-60 chars (~406px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (17/17) — critical for accessibility and SEO

14 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Local SEO

Local Search Readiness

5/100

Poor

2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F27/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

0/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:18%

Words:269

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

48/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

48/100

91 mg

CO₂e / view

734.1 KB

Page Weight

80%

Cleaner Than

New Visitor

104 mg

Returning (cached)

52 mg

Annual (10K/mo)

10.9 kg

Emission Segments

Data Center

20 mg

Network

22 mg

Device

49 mg

Resource Breakdown

Images

729.8 KB

CSS

1.5 KB

HTML

2.9 KB

Green Hosting Not Verified

LiquidNet US LLC

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Static / Informational

HTTPS

No WAF

38d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.04.2026

Valid Until

09.07.2026

Subject Alternative Names (2)

russellbarkley.orgwww.russellbarkley.org

SHA-256 Fingerprint

78:72:78:D3:ED:F3:86:CD:3A:B3:3D:B6:98:FF:A1:78:5D:E7:1C:96...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

content-encoding

📦 Gzip(gzip)

content-length

2643

content-type

text/html

date

Sun, 31 May 2026 15:43:57 GMT

etag

"23f5-63221c81edc74-gzip"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mx1.supremebox.com

mx2.supremebox.com

Domain Information

russellbarkley.org

Domain Age

20y 8m

Created

19.09.2005

Expires

19.09.2026

Last Updated

03.11.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

30/100

Not Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Arial

WCAG AAA

68/100

Readability

/30

16/30

16px · LH --

Hierarchy

/20

8/20

WCAG

/25

24/25

8.93:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Body Font

Arial

Sans16px

Contrast Ratio

8.93:1

WCAG AAA (≥7:1)

Reading Comfort

~108 CPL

Too wide

16px

✅ Excellent readability: 16px body text is ideal for all devices.

❌ Very long lines: ~108 chars/line causes eye strain. Add max-width constraint.

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 8.9:1).

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 48

Color Palette

8 unique colors

2.5:1 Fail Light

#ffffff

Text· 57.8%

#a2a4a5

Other· 4.2%

#9a0905

Primary· 7.5%

#421f1f

Secondary· 6.2%

#c8aca7

Secondary· 3.9%

#765f61

Secondary· 3.3%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(2)

Website Identity