Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12857/115269
Title: A Model to Estimate the Optimal Layout for Assistive Communication Touchscreen Devices in Children With Dyskinetic Cerebral Palsy
Authors: Bertucco, Matteo 
Sanger, Terence D
Keywords: AAC;assisted communication;cerebral palsy;information rate;optimization
Keywords Plus: STATISTICAL DECISION-THEORY;SIGNAL-DEPENDENT NOISE;CHILDHOOD DYSTONIA;REACHING MOVEMENTS;SOFT KEYBOARDS;MOTOR;INFORMATION;TASK;CAPACITY;LAW
Mesh headings: Cerebral Palsy;Communication Aids for Disabled;Dyskinesias;Self-Help Devices
Secondary Mesh headings: Adolescent;Algorithms;Child;Female;Healthy Volunteers;Humans;Male;Models, Theoretical;Predictive Value of Tests
Issue Date: 2018
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Journal: IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society 
Abstract: 
Excess involuntary movements and slowness of movement in children with dyskinetic cerebral palsy often result in the inability to properly interact with augmentative and alternative communication (AAC) devices. This significantly limits communication. It is, therefore, essential to know how to adjust the device layout in order to maximize each child's rate of communication. The aim of this paper was to develop a mathematical model to estimate the information rate in children with dyskinetic cerebral palsy and to determine the optimal AAC layout for a touchscreen tablet that results in enhanced speed of communication. The model predicts information rate based on button size, number, spacing between buttons, and the probability of making an error or missing target buttons. Estimation of the information rate confirmed our hypothesis of lower channel capacity in children with dyskinetic cerebral palsy compared with age-matched healthy children. Information rate increased when the AAC layout was customized based on the optimal parameters predicted by the model. In conclusion, this paper quantifies the effect of motor impairments on communication with assistive communication devices and shows that communication performance can be improved by optimally matching the parameters of the AAC touchscreen device to the abilities of the child.
URI: http://hdl.handle.net/20.500.12857/115269
ISSN: 15344320
DOI: 10.1109/TNSRE.2018.2840445
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