Administration of the C-BiLLT provides information of the child’s ability to understand spoken language by means of responding to items presented orally by the test leader, and visually on a personal computer.

Please contact us if you seek possibilities for collaboration and translation of the C-BiLLT in your country or institute.

No, The C-BiLLT is a diagnostic instrument that can only be assessed by a certified professional such as a speech and language therapist or, speech language pathologist, (neuro)psychologist, orthopedagogue or other equivalent employment.

The C-BiLLT is specifically developed to assess spoken language comprehension in unintelligible or non-speaking children with (severe) motoric impairment caused by cerebral palsy (CP). However, since its implementation and frequent use, it has proven also to be suitable for other diagnosis groups.

The C-BiLLT provides normdata from the age of 1;6 to 7;0 years. Obviously, the test may be assessed in older children or young adults when intellectual disability is suspected. Test results for children younger than 7;0 years are shown in percentile scores and test results for children older than 7;0 years are expressed as age-equivalents.·

See link with an overview of the necessary hardware

The C-BiLLT was developed so as to require very limited motoric responses from the child being assessed. In other words, the uniqueness and innovation of the C-BiLLT is that children can respond using a method that suits their needs, which includes:
1. Touch screen (operated by any body part e.g., hand, foot, nose)
2. Input switch(es) that can be adjusted to any body part
3. The child’s own wheelchair head rest (used as an input switch)
4. Eye gaze (the examiner observes the direction of the gaze and then selects the choice with an external mouse)
5. Independent eye gaze computer control with an infrared camera or with an eye control module. 6. A combination of two of the different access methods as described

Testscore results of the 88 items of the C-BILLT are automatically calculated and printed on a PDF scoreform which can be saved on the computer or in the medical dossier of the participant. The C-BiLLT provides normdata from the age of 1;6 to 7;0 years. Obviously, the test may be assessed in older children when intellectual disability is suspected. Test results for children younger than 7;0 years are shown in percentile scores and test results for children older than 7;0 years are expressed as age equivalents.

Would you like to join us by setting up a C-BiLLT subsidiary in your country? Contact us!

Information of the scenario for translation and validation of the C-BiLLT in other countries/languages can be found here.

Different countries (see C-BiLLT translations) are validating the C-BiLLT for use in their own country.

Because of its specific and technical applications, but also to guarantee a standardized assessment it is necessary to follow a training. After the training, a personal login code is provided which enables access to the online test environment of the C-BiLLT.
Training of the Dutch C-BiLLT is provided in the Netherlands. Different countries (see C-BiLLT translations) are validating the C-BiLLT for use in their own country. When these pilot studies are completed, the country itself will provide the training of the C-BiLLT. Information about the trainings can be found on the link of the selected country.

Because of its specific and technical applications, but also to guarantee a standardized assessment it is necessary to follow a training. After the training, a personal login code is provided which enables access to the online test environment of the C-BiLLT.

Training of the Dutch C-BiLLT is provided in the Netherlands. Different countries (see C-BiLLT translations) are validating the C-BiLLT for use in their own country. When these pilot studies are completed, the country itself will provide the training of the C-BiLLT. Information about the trainings can be found on the link of the selected country.