About the C-BiLLT

WELCOME on the site of the C-BiLLT, a computerized test for comprehension of spoken language. On this site you will find information of the background, development and application of the instrument. C-BiLLT stands for Computer-Based instrument for Low motor Language Testing. 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.
The C-BiLLT is specifically developed to assess spoken( Dutch) language comprehension in unintelligible or non-speaking children with (severe) motoric impairment caused by cerebral palsy (CP). It 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.
This variety in access methods allows even the most severely motoric handicapped children to respond reliably and unambiguously to the presented tasks of the test. Therefore, the C BiLLT is ideal for diagnostics in unintelligible or non-speaking children with severe motor impairments.