Oddly Wired
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memory

You learn significantly more by forgetting a little bit.

Distributed learning sessions result in longer retention than cramming the same amount of time into one sitting.

By forcing the brain to retrieve information after a period of decay, you strengthen the synaptic connections associated with that memory. Cramming creates a temporary, shallow trace that vanishes quickly.

Your brain requires rest to cement what you study.

Where this comes from

Study
Cepeda et al. (2006)
What the check found
The claim is accurate regarding the behavioral results of the cited study. While the neurological justification provided is a theoretical model rather than a direct quote, the phenomenon is established.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.