What is a digit span test?
The digit span test is one of the oldest and most reliable measures of working memory. Participants see or hear a sequence of digits and must repeat them back — either in the same order (forward span) or reversed (backward span). Backward digit span places additional demand on the central executive component of working memory.
How our Memory Lift exercise works
In Memory Lift, digits appear one at a time on screen. After the sequence completes, you must enter them in reverse order. Starting from 3 digits, the span increases with each correct answer and decreases when you make a mistake — keeping you at your optimal training zone.
Why working memory matters
Working memory is your brain's mental workspace — it holds and manipulates information for brief periods. It's critical for:
- Following multi-step instructions
- Mental arithmetic and problem-solving
- Reading comprehension (holding earlier sentences in mind)
- Learning new vocabulary and concepts
- Reasoning and decision-making
How much can you improve?
Studies show consistent working memory training can increase digit span by 15-30% over several weeks. A 2023 meta-analysis of 40+ studies confirmed that adaptive, progressively challenging training (exactly what Memory Lift does) produces the strongest gains.
Tips for digit span training
- Chunk the digits: Group numbers into pairs (e.g., remember "37 82 15" not "3 7 8 2 1 5").
- Use the phonological loop: Silently rehearse the digits in your mind.
- Stay consistent: 5 minutes daily yields better results than 30 minutes once a week.
- Track progress: Note your best span each session to stay motivated.