Accurate, remote cognitive assessment from any browser
OCTAL is a validated digital cognitive battery developed by neurologists and cognitive scientists at the University of Oxford. No app downloads, no logins, just open a browser and go. Click the icons below to try each task on a tablet or computer. The phone-optimised version, MiniOCTAL, takes about 10 minutes: try MiniOCTAL demo.
But you don’t need to use all the tasks. A combination of just two (taking about 5 minutes) can detect cognitive impairment as accurately as a 20-minute clinician-administered cognitive screen (AUC = 0.92), and can differentiate between subjective cognitive decline and mild cognitive impairment. Read more about OCTAL →
Simple Reaction Time
Number Vigilance Task
Object-in-Scene
Oxford Memory Test
Verbal Learning Memory
Rey-Osterrieth Figure
Corsi-Block
Digit Symbol Substitution
Trail-Making
Option Generation
Tower of London
Go-NoGo
News & Publications
- OCTAL methods paper published — comprehensive validation of the 11-task battery across 1,664 participants in npj Digital Medicine. [Zhao et al. 2026]
- Outstanding accuracy for Alzheimer’s detection — remote tablet-based testing strongly correlates with plasma biomarkers including p-tau181. [Toniolo, Zhao et al. 2024]
- Long-COVID cognitive slowing revealed — a 30-second reaction time task detects severe processing speed deficits in long-COVID patients. [Zhao et al. 2024]
- COVID-19 and attention — young people who contracted COVID-19 showed a minor attention deficit. [Zhao et al. 2022]
Contact
These tasks are developed by Dr Sijia Zhao and Prof Masud Husain from Cognitive Neurology Research Group at University of Oxford. Thanks to Dr Gabriel Jones for the inspiration of the branding design. The intellectural property is licensed by Oxford University Innovation (OUI). If you have any queries, please contact Dr Sijia Zhao (sijia.zhao@psy.ox.ac.uk).