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behaviourchangewheel.com screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

behaviourchangewheel.com

The Behaviour Change Wheel Book - A Guide To Designing Interventions

Page Load Speed

3.2 sec in total

First Response

303 ms

Resources Loaded

2.7 sec

Page Rendered

160 ms

behaviourchangewheel.com screenshot

About Website

Welcome to behaviourchangewheel.com homepage info - get ready to check Behaviour Change Wheel best content right away, or after learning these important things about behaviourchangewheel.com

Behaviour Change Wheel Book - Buy the Paperback Book, E-Book or Online Book here. Design and evaluate behaviour change interventions and policies. The Behaviour Change Wheel, A Guide To Designing Inte...

Visit behaviourchangewheel.com

Key Findings

We analyzed Behaviourchangewheel.com page load time and found that the first response time was 303 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

behaviourchangewheel.com performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

7/100

10%

LCP (Largest Contentful Paint)

Value13.5 s

0/100

25%

SI (Speed Index)

Value6.6 s

38/100

10%

TBT (Total Blocking Time)

Value400 ms

67/100

30%

CLS (Cumulative Layout Shift)

Value0.075

95/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

Network Requests Diagram

behaviourchangewheel.com

303 ms

www.behaviourchangewheel.com

569 ms

bwcore.3.0.css

524 ms

jquery.min.js

22 ms

jquery-ui.min.js

27 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 87% of them (62 requests) were addressed to the original Behaviourchangewheel.com, 3% (2 requests) were made to Code.britishwebsites.co.uk and 3% (2 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (877 ms) belongs to the original domain Behaviourchangewheel.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 296.6 kB (37%)

Content Size

802.2 kB

After Optimization

505.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Behaviourchangewheel.com main page is 802.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 369.6 kB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 87.8 kB

  • Original 97.0 kB
  • After minification 73.6 kB
  • After compression 9.1 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 23.4 kB, which is 24% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 87.8 kB or 91% of the original size.

Image Optimization

-7%

Potential reduce by 26.2 kB

  • Original 369.6 kB
  • After minification 343.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Behaviour Change Wheel images are well optimized though.

JavaScript Optimization

-56%

Potential reduce by 179.4 kB

  • Original 320.1 kB
  • After minification 317.9 kB
  • After compression 140.7 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 179.4 kB or 56% of the original size.

CSS Optimization

-20%

Potential reduce by 3.2 kB

  • Original 15.5 kB
  • After minification 15.5 kB
  • After compression 12.3 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Behaviourchangewheel.com needs all CSS files to be minified and compressed as it can save up to 3.2 kB or 20% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (36%)

Requests Now

66

After Optimization

42

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 66 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Behaviour Change Wheel. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

behaviourchangewheel.com

behaviourchangewheel.com

303 ms

www.behaviourchangewheel.com

www.behaviourchangewheel.com

569 ms

bwcore.3.0.css

bwcore.3.0.css

524 ms

jquery.min.js

jquery.min.js

22 ms

jquery-ui.min.js

jquery-ui.min.js

27 ms

jquery-ui.css

jquery-ui.css

11 ms

bwcore.3.0.js

bwcore.3.0.js

698 ms

vex.js

vex.js

88 ms

vex.dialog.js

vex.dialog.js

172 ms

init.js

init.js

254 ms

vex.css

vex.css

251 ms

bw-theme.css

bw-theme.css

253 ms

jquery.selectbox-0.2.js

jquery.selectbox-0.2.js

254 ms

jquery.selectbox.css

jquery.selectbox.css

255 ms

jquery.mCustomScrollbar.js

jquery.mCustomScrollbar.js

256 ms

customScrollBarMobile.js

customScrollBarMobile.js

334 ms

jquery.mCustomScrollbar.css

jquery.mCustomScrollbar.css

336 ms

jquery.form.js

jquery.form.js

338 ms

ajaxform-standard.js

ajaxform-standard.js

336 ms

pdfobject.js

pdfobject.js

339 ms

website.js

website.js

340 ms

index.js

index.js

416 ms

website.css

website.css

419 ms

website.top.css

website.top.css

419 ms

index.css

index.css

419 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

31 ms

analytics.js

analytics.js

134 ms

icon_login.png

icon_login.png

130 ms

book.png

book.png

251 ms

icon_browse.png

icon_browse.png

125 ms

icon_info.png

icon_info.png

126 ms

amazon.png

amazon.png

126 ms

waterstones.png

waterstones.png

123 ms

icon_arrow_right.png

icon_arrow_right.png

166 ms

policy_guidelines.png

policy_guidelines.png

171 ms

policy_environmental.png

policy_environmental.png

253 ms

policy_communication.png

policy_communication.png

259 ms

policy_legislation.png

policy_legislation.png

260 ms

policy_service.png

policy_service.png

332 ms

policy_regulation.png

policy_regulation.png

254 ms

policy_fiscal.png

policy_fiscal.png

332 ms

int_education.png

int_education.png

335 ms

int_persuasion.png

int_persuasion.png

338 ms

int_incentivisation.png

int_incentivisation.png

341 ms

int_coercion.png

int_coercion.png

342 ms

int_training.png

int_training.png

415 ms

int_enablement.png

int_enablement.png

415 ms

int_modelling.png

int_modelling.png

417 ms

int_environmental.png

int_environmental.png

421 ms

int_restrictions.png

int_restrictions.png

425 ms

eyelet.png

eyelet.png

425 ms

com_cap_psychological.png

com_cap_psychological.png

498 ms

com_cap_physical.png

com_cap_physical.png

501 ms

com_opp_social.png

com_opp_social.png

503 ms

com_opp_physical.png

com_opp_physical.png

504 ms

com_motive_reflective.png

com_motive_reflective.png

508 ms

com_motive_automatic.png

com_motive_automatic.png

509 ms

transparent.png

transparent.png

581 ms

quotes_left.png

quotes_left.png

583 ms

quotes_right.png

quotes_right.png

586 ms

footer_abc.png

footer_abc.png

588 ms

footer_bct.png

footer_bct.png

593 ms

footer_cbc.png

footer_cbc.png

594 ms

segoeuil.woff

segoeuil.woff

877 ms

segoeui.woff

segoeui.woff

795 ms

segoeuii.woff

segoeuii.woff

809 ms

currencies.js

currencies.js

560 ms

collect

collect

16 ms

sb_logo.png

sb_logo.png

539 ms

js

js

66 ms

set-currency

set-currency

215 ms

Accessibility Review

behaviourchangewheel.com accessibility score

59

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

behaviourchangewheel.com best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

behaviourchangewheel.com SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Behaviourchangewheel.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Behaviourchangewheel.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

behaviourchangewheel.com

Open Graph description is not detected on the main page of Behaviour Change Wheel. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: