Welcome to the DCAL Portal


DCAL offers online tests of Sign Language, Speechreading and Cognition to assess:

Language abilities and language development in deaf adults and children

Deaf signers where there are concerns about language impairment, brain injury, brain disease, stroke or dementia

Who are we?

Our tests were developed as part of our research at the Deafness, Cognition and Language Research Centre at University College London.

DCAL is the largest research centre in Europe focused on sign linguistics, psychology and neuroscience.

The centre brings together leading Deaf and hearing researchers to provide unique insights into language thought, by studying deaf people’s communication and cognition.


This is an important resource for the Deaf community and families of deaf children enabling them to request assessment using accessible tests, normed on deaf people like themselves.

Anonymous research using test data will contribute to future knowledge about deafness and language.

Who for?

Suitably qualified professionals may use our tests to conduct assessments of deaf adults and children

Researchers may use our tests in their research studies

After applying for permission to use our tests, professionals and researchers may purchase tests

Individuals and families may request testing via an educational or healthcare professional

OR you can get an expert assessment via the DCAL Assessment Clinic

Information for Deaf people, Participants and Parents

Our tests are designed to be used by qualified professionals and researchers. If you wish to be tested, or to have your child assessed, please seek advice from a qualified professional who will be able to approach us to obtain permission and/or training to use the tests.

DCAL Assessment Clinic

Members of the DCAL team work with UCL Partners Hospital of Neurology and Neurosurgery (NHNN), Queen's Square, London, to provide a National Cognitive Disorders Clinic for Deaf patients.

DCAL colleagues also provide input to the Sign Language Assessment Clinic at the Roberta Williams Speech and Language Therapy Centre at City, University of London.

Professional Quality


The portal uses up-to-date cryptography, end-to-end SSL and realtime database encryption to ensure that your data is secure and meets ethical requirements.

GDPR Compliant

The portal is fully encyrpted and GDPR compliant