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    <loc>https://www.trevorhewitt.com/projects/interactive-visualisations-of-participant-drawn-visual-hallucinations</loc>
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    <lastmod>2026-03-18</lastmod>
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      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/f95c783a-c6be-42da-bef7-c3cb7d80254f/Screenshot+2026-03-18+2.19.33+PM.png</image:loc>
      <image:title>projects - Interactive visualisations of participant-drawn visual hallucinations - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
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  <url>
    <loc>https://www.trevorhewitt.com/projects/research-paper-image-recreations-of-visual-hallucinations</loc>
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    <priority>0.5</priority>
    <lastmod>2026-03-18</lastmod>
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      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/632a7523-3f15-4a07-9bf5-bb15a182c97a/iri_fig_5.jpg</image:loc>
      <image:title>projects - New Research: Image Recreations of Visual Hallucinations (preprint) - Make it stand out</image:title>
      <image:caption>Figure 5 from the paper shows how typical hallucinations change at different frequencies of strobe light, with hallucinations resulting from 11 Hz light being the most intense.</image:caption>
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  <url>
    <loc>https://www.trevorhewitt.com/projects/developing-safety-standards-for-strobe-research</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2026-03-09</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/c97de25e-83b8-4c5a-b6ce-bfa5e77ca624/WhatsApp+Image+2026-03-09+at+14.53.13.jpg</image:loc>
      <image:title>projects - Developing safety standards for strobe research - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/strobe-history</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2026-03-08</lastmod>
  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/6d-vhq</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2026-03-08</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/a32719dd-b093-4331-9906-7c096e8d36c4/VHQ+figures+%281%29.png</image:loc>
      <image:title>projects - New Research: Psychedelic versus Stroboscopic Visual Hallucinations (preprint) - Make it stand out</image:title>
      <image:caption>Laboratory-induced strobe hallucinations were primarily geometric. Psychedelic experiences also contained geometric elements but more frequently included complex, scene-like imagery.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/dreamachine-drawings</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2026-03-09</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/bf87ae3f-5a28-4128-9829-e4d919844845/Anil_Image.jpeg</image:loc>
      <image:title>projects - New Research: What can we learn from artistic depictions of hallucinations? (preprint) - Make it stand out</image:title>
      <image:caption>Attendees of Dreamachine drew many thousands of images of their experiences.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/the-vision-experiment</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2026-03-18</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/a131ae9c-bbf7-49c2-ae9f-19b578a60de8/WhatsApp+Image+2026-03-08+at+14.27.23.jpeg</image:loc>
      <image:title>projects - The Vision Experiment - Make it stand out</image:title>
      <image:caption>Students were invited to not only take part in an experiment, but learn about how the scientific process works.</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/353a1539-d2f8-49cb-81d9-3ca1f8e2e9a2/6df098b5-50eb-49eb-a003-b721a03ed390.jpeg</image:loc>
      <image:title>projects - The Vision Experiment - Make it stand out</image:title>
      <image:caption>Researchers testing the set up, which allowed for small groups of participants to be induced with strobe hallucinations simultaneously</image:caption>
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  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/closed-eyes</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2025-07-06</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/144fe3e4-fd9a-4bcd-bb60-afc15702bc53/RECAL_flyers_for_print+v2+%282%29.png</image:loc>
      <image:title>projects - Active study - investigation of Closed‑Eye Psychedelic Visual Hallucinations - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/perception-census</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2025-07-03</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/bce572ba-02e5-4131-91ba-cd57c49ef2bd/census_2.jpg</image:loc>
      <image:title>projects - Experimental Task Design for Perception Census - Make it stand out</image:title>
      <image:caption>Whatever it is, the way you tell your story online can make all the difference.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/dreamachine-d5474</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2025-07-03</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/8db5d4b7-233c-4514-babc-18d54330e084/dm_drawings_space.png</image:loc>
      <image:title>projects - Neuroscientific Advising for Dreamachine</image:title>
      <image:caption>Over 10 thousand people drew their experiences after the Dreamachine</image:caption>
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  </url>
  <url>
    <loc>https://www.trevorhewitt.com/projects/guardian-article-for-the-perception-census</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2025-07-03</lastmod>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480802981-EL68QPQ96AB45KUD3FF0/Image_2_padget_edit.png</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - Experiences change the way we see</image:title>
      <image:caption>After a brain injury, Jason Padget’s vision became suffused with geometry. Now a mathematician and artist, here he depicts how he sees his own hand.  Illustration: Quantum Hand Through My Eyes, Jason Padget, 2006</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480844515-W0LS23S5QFS6IAND98GB/Image_3_penne_phosphenes.jpg</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - Vision at the edges of perception</image:title>
      <image:caption>Oddities of perception are part of all of our lives. Most people see patterns called ‘phosphenes’ when exposed to flashing light or pressure on the eyes.  Illustration: Phil Penne</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480846487-Y1HYCCJHWPZX2B0ZEPNH/Image_4_purkinje_edit_v1.png</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - The echoes of our brain at work</image:title>
      <image:caption>Scientists began documenting the content of phosphenes 200 years ago. We now understand them as reflections of the neural processing of our eyes and brain. Illustration: Purkinje, 1819</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751575805782-YYB59RLW5YQ54OWQ75LG/f7b67d62-7a9d-48a6-9d94-98da5b5e81ec.jpeg</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - The colourful world behind your eyes</image:title>
      <image:caption>Audiences in the Dreamachine experienced a world of colours and phosphene-like phenomena behind closed eyes, reflected in their drawings - each one unique. Composite: Anonymised drawings from attendees of the Dreamachine, Collective Act</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480817165-BYSF209ZDS3E3IHL7EG8/Image_6_570585571-huge.jpg</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - Movement in stillness</image:title>
      <image:caption>Geometric images can produce unique experiences too. This ‘apparent motion’ optical illusion causes many people to see movement where there is none. Image by Perepadia Y, illusion discovered by Akiyoshi Kitaoka</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480821150-LYUURCHE0CD71PDV6ZAZ/Image_7_starbursts.jpeg</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - Scintillating starbursts</image:title>
      <image:caption>New illusions are often being found. Scientists recently discovered that people see rays of brightness in this image and are working to understand why.  Illustration: Scintillating Starbursts Illusion by Karlovich and Wallisch, 2021</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480815832-UO8UL28OMF98PT6HNFRN/Image_8_screenshot6.PNG</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - The Universe is held within you</image:title>
      <image:caption>No one but you has your brain, your mind or your perspective on reality. The hidden landscapes of our inner worlds have baffled great thinkers for centuries illustration: Collective Act</image:caption>
    </image:image>
    <image:image>
      <image:loc>https://images.squarespace-cdn.com/content/v1/68630f1e0210970597c7a7de/1751480842002-6259MAWWDE74WYAHNZW3/Image_9_Dreamachine+installation.+Photo+credit+Urszula+Soltys+3.jpg</image:loc>
      <image:title>projects - Guardian Article for the Perception Census - Do you see what I see?</image:title>
      <image:caption>The Perception Census aims to map this diversity of experience. Take part to contribute your unique insights to our shared exploration of the human mind. Photograph: Urszula Soltys</image:caption>
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  <url>
    <loc>https://www.trevorhewitt.com/projects/naturalistic-simulations-for-film</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
    <lastmod>2025-07-03</lastmod>
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    <changefreq>daily</changefreq>
    <priority>1.0</priority>
    <lastmod>2026-04-03</lastmod>
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  <url>
    <loc>https://www.trevorhewitt.com/contact</loc>
    <changefreq>daily</changefreq>
    <priority>0.75</priority>
    <lastmod>2026-04-02</lastmod>
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  <url>
    <loc>https://www.trevorhewitt.com/tristable_illusion</loc>
    <changefreq>daily</changefreq>
    <priority>0.75</priority>
    <lastmod>2026-04-02</lastmod>
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