Jane is learning a new sport called bouldering, where she climbs a wall using boulders of one colour. She has learned the general rules of bouldering, like how to grip a boulder, how to fall safely, and how to plan a route before starting the climb. She is at the stage where she can climb with these basic fundamentals in mind without consciously reminding herself of these rules. She has also come up with a few tricks to avoid beginner mistakes. Nonetheless, she sometimes finds herself using the wrong foot posture, or making a move that makes the climb more difficult. She is consciously trying to correct these errors as she tries to climb harder routes and become a better climber. Which stage of skill acquisition best describes Jane's bouldering skills?