What a mind map is actually good at
Exposing structure. When you have to decide whether a concept is a child of this branch or that one, you are forced to articulate a relationship you had been holding vaguely. That decision is real cognitive work, and it frequently reveals that you did not understand how two things connect at all.
It is also very good at showing you what is *missing* — an anaemic branch is a topic you have not learned, and it is visible from across the room.
What it is bad at
Retention. Nothing about a completed mind map creates retrieval practice, and staring at one produces exactly the fluency illusion that re-reading does — worse, actually, because it is prettier and therefore more convincing.
There is also a failure mode specific to maps: the map becomes the project. Colour-coding, redrawing, fitting it to one page. That is procrastination with excellent stationery, and it is very hard to notice from the inside.
How to use one properly
- Build it from memory, not from your notes. A map drawn while looking at the slides is a transcription exercise. A map drawn from a blank page is blurting with arrows.
- Then check it against the source and add the gaps in red. The red is the revision list.
- Redraw it from scratch a week later. Never look at the old one first.
- Do not decorate. If you are choosing colours, you have stopped studying.