Fig 2. Examples of learning curves for each of the three observed learning patterns.

From left to right: (a) Successful Learner, (b) “Borderline” and (c) Non-Learner. The red line corresponds to 80% correct. For the successful subjects, the point where they reach the 80% red line (if they stay above it thenceforward) is considered the “learning point,” which then serves as a basis for splitting our EEG data for the before-after comparison.