Working Memory Assessment
A real, two-minute digit-span test that measures how much information your brain can hold and manipulate at once.
Watch a sequence of digits, then type it back.
- • Digits appear one at a time, about a second each.
- • When the sequence ends, type what you saw.
- • Get it right → the next sequence is one digit longer.
- • The test ends after two misses in a row. Max: 12 digits.
What working memory actually is
Working memory is your brain's mental scratchpad — the small, high-speed buffer that holds information for a few seconds while you actively use it. It is how you keep a phone number alive long enough to dial it, follow a multi-step instruction, or hold a thought while someone interrupts you.
Unlike long-term memory, working memory is tiny. Most healthy adults can hold roughly seven items at once, give or take two. That single bottleneck shapes a surprising amount of your daily cognition.
New knowledge has to pass through working memory before it can be stored. A bigger buffer means you can absorb more in one pass.
Working memory holds your current goal in mind. When it's overloaded, distractions win and you lose your place.
Mental arithmetic, planning and reasoning all juggle intermediate steps. More working memory = more variables in play at once.
Information you don't actively hold in working memory rarely makes it into long-term memory in the first place.