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Operation Span Test
A maths problem flashes up, then a letter. Solve the problem, remember the letter, and move on. At the end of each set, type the letters back in the order you saw them. Eight sets measure your working memory capacity and maths accuracy.
Solve the maths, then remember the letter.
0sets recalled
About the Operation Span Test
The operation span (OSPAN) task is the classic measure of working memory capacity. Keeping a letter in mind while solving a maths problem forces you to hold and process information at the same time, which is what working memory does all day.
You see one maths problem and one letter for each position in the set. Solve the problem honestly — accuracy below 60% makes the recall score unreliable. Your result is the number of sets recalled perfectly in order.
About
The Operation Span Test measures working memory capacity by interleaving simple arithmetic verification with letter recall. In each of eight sets you judge whether a displayed equation such as (3 × 2) + 1 = 7 is true or false, then a single letter appears for brief study. After completing all math-and-letter pairs in a set you must type or click the letters in the exact order they were shown. The task forces you to maintain and manipulate information simultaneously, tapping the central executive component of working memory rather than simple short-term storage alone.
How your result is scored
Your result combines two metrics: math accuracy percentage and the total number of letters recalled in correct serial position across all sets. High math accuracy with low letter recall suggests difficulty maintaining items while processing, while low math accuracy may indicate rushed verification. The tool reports both raw counts and a composite span score so you can see whether processing speed, storage capacity, or the coordination between them is the limiting factor.
Tips to improve
- Rehearse each letter silently while solving the next equation to strengthen maintenance.
- Group letters into meaningful chunks or mini-stories to reduce load.
- Keep a steady rhythm on math decisions; avoid long pauses that let letters decay.
- Practice with shorter set lengths first, then gradually increase to the full eight sets.
- Minimize visual distractions and ensure consistent lighting for reliable session-to-session comparison.
Related
Frequently asked questions
- How long does a full Operation Span session take?
- A standard eight-set session typically lasts five to seven minutes depending on your reading and response speed.
- Can I use a keyboard instead of clicking the on-screen buttons?
- Yes, number keys 1 and 2 or the T and F keys map to true and false, and letters can be typed directly during recall.
- Does the test adapt difficulty based on my performance?
- No, the set length and equation complexity remain fixed so scores are comparable across sessions.
- Is this test a clinical diagnostic for ADHD or dementia?
- It is a cognitive screening aid only and cannot diagnose any medical condition.