If you've ever heard the term "practice makes perfect," it’s a most fitting description of automaticity, which means being able to do something effortlessly because you've practiced it so much.
Think of automaticity as your brain flipping on the "easy mode" for tasks you’ve practiced repeatedly. It comes from the word automatic, which refers to actions performed effortlessly and without conscious thought. An example of automaticity is mastering a new skill, like riding a bike. At first, bike riding might require a lot of brain power and effort to accomplish, but after a a bit of practice, it becomes so easy that you don’t have to think about it at all.