Visually-impaired judoka took part in a quiz designed to provide education on anti-doping at the Judo Grand Prix in Baku earlier this month.
The Azerbaijan National Anti-Doping Agency (AMADA) developed the audio test, iQuiz, alongside the the International Blind Sports Federation (IBSA).
The questions, based on World Anti-Doping Agency rules, have true or false answers with athletes pressing the relevant button to give their answers.
Judoka who answer 80 per cent or more of questions correctly are given an "ippon" point and pass the test.
A wrong answer results in a "shido" penalty point, while a second incorrect response ends the quiz.
It was demonstrated by Azerbaijan's Paralympic medallist Ilham Zakiyev.
The quiz was then completed by judoka from the 34 countries which competed at the Grand Prix.
IBSA also gave out Braille versions of anti-doping booklets, with information on the doping control process, therapeutic use exemptions (TUEs), and the list of prohibited substances and methods.