We assess brain function,
but without all the tests.

QuantActions specializes in digital phenotyping for neurological and mental health.

We introduce TappigraphyTM, a unique measurement method leveraging everyday smartphone interactions to assess cognitive status and neurological health.

>1K

Users in clinical settings

15+

Publications

2

Patents
Trusted by renowned scientific institutions in Europe, Asia and the US.
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Connecting the dots

Timing patterns of smartphone interactions decoded

Our technology links smartphone interaction patterns to core brain processes, offering insights into neurological and mental health. By mapping these interactions to abnormal neural events, motor functions, memory, circadian cycles, and sleep, we develop health indicators, such as for disease management of epilepsy, brain recovery, stroke, and more.

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This is how it works

1. Capture timing patterns of taps

We start by capturing timing patterns of smartphone interactions, such as touches on the screen or keyboard, recorded throughout the day across various smartphone usage contexts, spanning over 2500 feature dimensions.

2. Construct behavioral maps

Using this data, we create a behavioral map for each user at any given time, highlighting individual patterns, such as reduced interaction speed, which is commonly associated with chronic stress and other conditions.

3. Extract signals of cognitive functioning

Our advanced AI system correlates the behavioral maps with ground truth data, such as lab-based cognitive assessments (e.g., reaction time tests) conducted in controlled study environments.

4. Generate an interpretable score

Our AI algorithms compare individual user signals to those of a reference healthy population, synthesizing the results into a digital cognitive proxy that provides valuable insights into cognitive abilities.

Feature

Peer-reviewed publications

van Nieuw Amerongen A. R., Meppelink A. M., Ghosh A., Thijs R. D. (2024)
Real-world smartphone data can trace the behavioural impact of epilepsy: A case study
Kock, R., Ceolini, E., Groenewegen, L., Ghosh, A. (2023).
Neural processing of goal and non-goal-directed movements on the smartphone
Reichenbacher, T., Aliakbariana, M., Ghosh, A., Fabrikant, S. I. (2022).
Tappigraphy: continuous ambulatory assessment and analysis of in-situ map app use behaviour
Ceolini, E., Brunner, I., Bunschoten, J., Majoie, M.H.J.M., Thijs, R. D., Ghosh, A. (2022).
A model of healthy aging based on smartphone interactions reveals advanced behavioral age in neurological disease
Duckrow, R. B., Ceolini, E., Zaveri, H. P., Brooks, C., & Ghosh, A. (2021).
Artificial neural network trained on smartphone behavior can trace epileptiform activity in epilepsy.
Massar, S. A. A., Ng, A. S. C., Soon, C. S., Ong, J. L., Chua, X. Y., Chee, N. I. Y. N., Lee, T. S., Chee, M. W. L. (2021).
Reopening after lockdown: the influence of working-from-home and digital device use on sleep, physical activity, and wellbeing following COVID-19 lockdown and reopening
Westbrook, A., Ghosh, A., van den Bosch, R., Määttä, J. I., Hofmans, L., & Cools, R. (2021).
Striatal dopamine synthesis capacity reflects smartphone social activity.
Massar, S.A., Chua, X.Y., Soon, C.S., Ng, A.S., Ong, J.L., Chee, N.I., Lee, T.S., Ghosh, A. and Chee, M.W. (2021).
Trait-like nocturnal sleep behavior identified by combining wearable, phone-use, and self-report data.
Gindrat, A. D., Chytiris, M., Balerna, M., Rouiller, E. M., & Ghosh, A. (2015).
Use-dependent cortical processing from fingertips in touchscreen phone users.