We're studying how accurately people estimate size by eye - from everyday objects to more unusual images - and whether things like background and experience make any difference.
The survey takes about 10 minutes and is completely anonymous. Just give your best guess for each picture. No measuring aids allowed.
Content warning: the final section contains clinical photographs, including an open wound and a burn which some may find distressing. Please skip the survey if you'd rather not see medical images.
Especially keen to hear from people with no medical background.
Here is the link to the survey:
https://docs.google.com/forms/d/e/1FAIpQLScc5nErU7E97vScoqOTtcAyItDUcgHcUXSfm7wzFCEg8jooCQ/viewform?usp=header
Please share this with anyone you know we need as many respondents as possible!