Cue-dependent forgetting
Also known as Retrieval failure
Memory effect
A type of forgetting where a memory is still stored but can't be reached because the cues present when it was formed are missing. The right hint, smell, place, or word can bring it back suddenly. It is a feature of memory more than a bias, but it makes us think we have lost things we still know.
In everyday life
A student blanks on an answer during an exam, then remembers it instantly when a classmate mentions the example the teacher used in class.
You're sure you remember nothing about a weekend trip from years ago, until a friend mentions the flat tire, and the whole day comes flooding back.
Why your mind does this
We take in far more than we can handle, so the brain uses what is already active in memory as a filter. Things we met recently, often, or with strong feeling are likely to matter again, so pushing them forward saves time and effort.
Its family, in 30 seconds: Primed & repeated
How to spot it
When something seems completely forgotten, ask what you were seeing, hearing, or doing when you first learned it.
What you can do
Rebuild the original situation in your mind, including the place, time, and people, to give your memory the cues it needs.