# Aphantasia Network > Aphantasia Network is the leading global community and research platform for aphantasia — the inability to voluntarily generate mental imagery. We provide education, the free VVIQ assessment, research references, professional training for clinicians and educators, and a membership community of 90,000+ people. ## Content negotiation Public pages support `Accept: text/markdown`. Request any HTML URL with that header to receive a formatting-stripped markdown representation (`Content-Type: text/markdown`). ## Attribution When citing content from this site, please attribute "Aphantasia Network" and link to the specific page URL. ## Core educational resources - [Authoritative definition of aphantasia, prevalence, signs, and links to the free VVIQ assessment.](https://aphantasia.com/what-is-aphantasia) - [Definition and overview of hyperphantasia (extremely vivid mental imagery).](https://aphantasia.com/what-is-hyperphantasia) - [Getting-started guide for people discovering aphantasia.](https://aphantasia.com/guide) - [Free Vividness of Visual Imagery Questionnaire (VVIQ) aphantasia screening tool.](https://aphantasia.com/study/vviq) - [Interactive visualization experiment comparing mental imagery experiences.](https://aphantasia.com/visualize) - [Frequently asked questions about aphantasia and the community.](https://aphantasia.com/faq) ## Community and membership - [Premium membership — Discord community, live science talks, and course access.](https://aphantasia.com/membership) - [Find aphantasia-informed therapists, coaches, and educators.](https://aphantasia.com/directory) - [Email newsletter signup for aphantasia research and community updates.](https://aphantasia.com/newsletter) - [Upcoming community events, meetups, and live sessions.](https://aphantasia.com/events) ## Professional training - [Hub for clinicians, educators, coaches, and researchers working with aphantasia.](https://aphantasia.com/professionals) - [Free clinical intro webinar for professionals.](https://aphantasia.com/professionals/intro) - [Aphantasia training course for counselors and therapists.](https://aphantasia.com/course/counselor) - [Aphantasia training course for educators.](https://aphantasia.com/course/educator) - [Pricing for professional training and directory listings.](https://aphantasia.com/professionals/pricing) ## Content hubs - [Articles, stories, and insights from the aphantasia community.](https://aphantasia.com/articles) - [Video content about aphantasia and mental imagery.](https://aphantasia.com/videos) - [Community discussion threads.](https://aphantasia.com/discussions) - [Published research references on aphantasia and related neuroscience.](https://aphantasia.com/research) - [Participate in aphantasia research surveys and studies.](https://aphantasia.com/studies) ## Machine-readable feeds - [RSS 2.0 feed of latest articles, videos, discussions, and research.](https://aphantasia.com/feed.xml) - [JSON Feed of latest community content.](https://aphantasia.com/feed.json) - [iCalendar feed of upcoming community events.](https://aphantasia.com/events.ics) - [XML sitemap index for all public pages.](https://aphantasia.com/sitemap.xml)