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Background It is challenging to reliably assess the language comprehension of children with severe motor and speech impairments using traditional assessment tools. The Computer Based instrument for Low motor Language Testing (C-BiLLT) aims to reduce barriers to evidence-based assessment for this population by allowing children to access the test using non-traditional methods such as eye gaze so they can independently respond to test items. The purpose of this study is to develop a contextualized understanding of the factors that influenced clinicians’ implementation of the C-BILLT in practice in the Netherlands and Norway. Materials and methods A qualitative approach including semi-structured individual interviews with 15 clinicians (speech-language pathologists, neuropsychologists, and one teacher, counsellor, and vision specialist) was used. Data analysis was conducted in two rounds. First, a deductive approach including a codebook was used to code data within the COM-B components describing clinicians’ capability, opportunity, and motivation for behaviour change. Then, an abductive approach applying thematic analysis was used to identify meaningful patterns within the COM-B components. Results Several meaningful barriers and facilitators were identified across the data. Clinicians used the C-BiLLT with two distinct groups of clients: (1) the population it was originally developed for, and (2) clients that could have also been assessed using a traditional language test. Clinicians working with the first group experienced more, and more complex barriers across all COM-B components, to successful C-BiLLT use than the latter. Conclusion This study provides timely insights into the capability, opportunity, and motivation factors important for creating and sustaining assessment behaviour change in clinicians who used or attempted to use the C-BiLLT. Potential tailored intervention strategies aimed at improving implementation of novel assessment tools are discussed and may be helpful for others working to improve service delivery for children with complex needs.

A group of 20 children with cerebral Palsy, and complex communication needs (NSCP) (GMFCS IV and V) and a group of 42 children with no disability participated in this exploratory study to (1) devise a computer-based instrument (C-BiLT) that measures the comprehension of spoken language in young children (18 - 75 months) with NSCP, and to (2) investigate whether this instrument can be an alternative for standard language assessments such as the Reynell Development Language Scale (RLDS). The C-BiLT minimizes the demands in movement enabling all children with GMFCS V to perform better. Preliminary results are promising and form a sound basis for further development.