Using these review segments, the independent review variable
included four levels: (1) no review, (2) maladaptive review,
which presented the review segment on the topic that hadthe highest average EEG attention levels, (3) adaptive review,
which presented the review segment on the topic that had the
lowest average EEG attention levels, and (4) full review, which
presented all four review segments. In order to control for time
differences between the no review, maladaptive review, and
adaptive review conditions, participants in the no review condition
were instructed to listen to one minute of classical music
instead of spending one minute on review. Time differences
were not controlled for participants in the full review condition,
thus participants who received the full review interacted
with the system for three additional minutes. Student prior
knowledge of the lecture material was controlled for by means
of an initial quiz prior to receiving instruction.