Test and train your working memory by reversing number sequences. Based on clinical neuropsychology assessment tools.
Start Test NowA neuropsychological assessment tool that measures working memory capacity by requiring you to repeat number sequences in reverse order
Unlike the standard digit span test, you must recall and enter the digits in reverse order. For example, if you see "3-7-2", you would enter "2-7-3".
The backward digit span test specifically assesses the phonological loop and executive attention system in Baddeley's model of working memory.
Widely used in neuropsychological assessments to evaluate cognitive impairment, brain injury recovery, and cognitive deficits.
Reverse recall is significantly more challenging than forward recall, requiring both storage and manipulation of information.
Results are compared to age-adjusted norms. Average backward span is typically 3-4 digits, with healthy adults averaging 4-5 digits.
Used extensively in cognitive psychology research to study working memory capacity, attention, and executive function.
Understanding the test procedure and what skills it measures
A sequence of numbers appears on screen, one at a time, for you to memorize. Each number displays for 1 second.
Watch the complete sequence without any interruption. You cannot control the speed - it runs automatically.
After the sequence completes, enter the numbers in reverse order. If you saw "4-9-2", type "2-9-4".
The test starts with 2 digits and increases by 1 digit for each successful level, up to 12 digits maximum.
You receive points for each correct answer. Correctly entering 5 digits in reverse gives you 25 points.
After 12 levels, view your total score, working memory capacity estimate, and performance rating.
What your backward digit span test results mean
| Score Range | Performance Level | Backward Span Capacity | Description |
|---|---|---|---|
| 400-510 | Exceptional | 7-8 digits | Excellent working memory and cognitive control |
| 300-399 | Above Average | 6 digits | Above average working memory capacity |
| 200-299 | Average | 5 digits | Normal working memory function |
| 150-199 | Below Average | 4 digits | Slightly below average, may improve with practice |
| Below 150 | Low | 3 digits or less | May indicate working memory challenges |
Your backward span capacity is typically 1-2 digits less than your forward span. A significant drop may indicate executive function challenges.
Regular practice with working memory tasks can improve performance by 10-20% over several weeks of training.
Single test results are not diagnostic. Consider multiple assessments and consult a neuropsychologist for clinical concerns.
Scientific evidence and clinical applications of backward digit span testing
The digit span test was first developed by Jacobs in 1887 and standardized by Wechsler in the early 1900s. The backward span component was added to specifically assess executive function.
Backward digit span activates the dorsolateral prefrontal cortex, anterior cingulate cortex, and parietal regions involved in working memory and cognitive control.
Used to assess cognitive function in traumatic brain injury, stroke, dementia, ADHD, and to monitor recovery or treatment effectiveness.
Large-scale studies (n>5000) provide age-adjusted norms. Performance typically peaks in young adulthood and gradually declines with age.
Backward digit span shows strong correlation with general cognitive ability (r=0.6-0.7) and is highly sensitive to frontal lobe dysfunction.
Test-retest reliability ranges from 0.75-0.85, indicating good stability of measurement across time.