When you click the star button next to a story (mnemonic) it will now move up to a separate section called "Favourites". Voted stories now always appear at the top of the list in this new section.

With this change a vote now acts as a kind of bookmark. It tells other users you found this story helpful, while at the same time makes the story easier to find when you come back to the study page.

This feature was suggested by shmuel in the feedback forum.