This question behaviour allows students to self-assess their own attempt at a question. At the moment it only works with the Record audio question type, but this is a limitation that will be removed in future.
Install from the Moodle plugins database https://moodle.org/plugins/qbehaviour_selfassess in the normal way.
Or you can install using git. Type this commands in the root of your Moodle install
git clone https://github.com/moodleou/moodle-qbehaviour_selfassess.git question/behaviour/selfassess
echo /question/behaviour/selfassess/ >> .git/info/exclude
Then run the moodle update process Site administration > Notifications
Once this plugin is installed, if you have a 'Record audio' question in a quiz (or similar) that is set to use 'Immediate feedback' or 'Interactive with multiple tries', then rather than having to be manually graded by the teacher, the question becomes self-assessed.
That is, once they have submitted, students can rate their submission on a scale from one to five stars, with an optional comment.