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Psychology

Working Memory's Role in Problem Solving

Quick fact

Working memory capacity averages about 7 items (plus or minus 2), which is why phone numbers are typically 7 digits long—it fits our mental scratchpad.

Why this is interesting

You're solving a tricky puzzle, holding numbers in your head—then suddenly you lose track. Why does that happen? That moment reveals the hidden role of working memory in every problem you tackle.