N-Back d'
Cognitive Tests number
Sensitivity in N-Back working memory test (d-prime).
Detailed Description
d' (d-prime) from signal detection theory — separates memory ability from response bias. Calculated as z(hit rate) - z(false alarm rate). Typical values 1.5–3.5. Sensitive to sleep deprivation and cognitive load.
How to Improve
- Prioritize sleep — working memory is maximally rest-dependent
- Meditation (improves working memory — Mrazek 2013)