Desirable Difficulties Are a Feature, Not a Bug

"desirable difficulties"

Bjork's research gives a useful warning label for anyone building learning software: effort is not automatically bad. Some difficulty improves learning if it is structured, recoverable, and tied to retrieval.

That matters for bar prep because the exam itself is not gentle. Candidates need to learn how to work under uncertainty, not just how to repeat a familiar pattern in a comfortable setting.

Vrenberg uses that idea in three places:

• Timed drills that force the learner to decide under pressure.
• Trap-radar sets that make wrong-but-plausible answers visible.
• Missed-rule reviews that require the learner to repair the exact weakness that showed up.

The point is not to make the work miserable. The point is to make the work memorable. If the learner has to think a little harder during study, and that struggle is tied to the right structure, the result is better retention when the real exam starts asking for the same rule.

That is what makes the difficulty desirable instead of wasteful.