Instagramis running a social media experiment in Australia and elsewhere to see what happens when it hides the number of likes on photos and other posts.

If you have an Instagram account, you’ll get to see the numbers but your followers won’t – at least, not automatically. They will be able to click and see who liked your post, but will have to count the list of names themselves.

The trial is taking place right now in six countries: Australia, Brazil, Canada, Ireland, Italy, Japan and New Zealand. Canada has just finished its trial.

It’s a bold move by Instagram, but arguably a necessary one. There is growing concern about the effect of social media on young people’s mental health and self–esteem.

Read more: Women can build positive body image by controlling what they view on social media