Why does filling in half an answer often stick better than just reading it?

Answer: Self-generation binds it

More visual exposure — More exposure can help when the first look was too weak, so this is a real competing idea. But the generation-effect comparison is sharper: people remember better when they produce the target from a cue than when they simply read it. The visual input can be almost the same. What changes is the act of completing the item.

Self-generation binds it ✓ — Right. The generation effect says information people produce themselves is often remembered better than the same information read passively. Slamecka and Graf found the effect across several tests and encoding rules. That is why a tiny blank, fragment, or guess can make a short question feel like participation.

Effort alone stores it — Effort matters, but not every effort automatically helps memory. Random difficulty can distract or overload; useful effort is tied to the target relation. In generation tasks, the learner uses a cue to produce the missing response. That kind of effort binds the answer to a route back to it.