The Tower of Hanoi is considered a classic example of the kind of task cognitive psychologists have their participants perform to illustrate problem-solving strategies. While it can simply be used as an intermediary distractor task to some larger manipulation, it can also be used as a stand-alone manipulation unto itself.

As an example, you might encourage your students to split into two groups, with the between-subject manipulation being something on the order of, "Number of Discs." Though likely a predictable outcome, can you think of a situation where the group with the greater number of discs might outperform the comparison group?