title: A Nonlinear Model for Mouse Pointing Task Movement Time Analysis Based on Both System and Human Effects.
abstract: This paper provides a detailed model for analyzing movement time performance during rapid goal-directed point- and-click motions with a computer mouse. Twelve typically developed individuals and eleven youths with cerebral palsy conducted point and click computer tasks from which the model was developed. The proposed model is nonlinear and based on both system (target width and movement amplitude) and human effects (erroneous clicks, number of submovements, number of slip-offs, curvature index, and average speed). To ensure successful targeting by youths with cerebral palsy, the index of difficulty was limited to a range of 1.58 - 3.0 bits. For consistency, the same range was used with both groups. The most significant contributing human effect to movement time was found to be the curvature index for both typically developed individuals and individuals with cerebral palsy. This model will assist in algorithm development to improve cursor speed and accuracy for youths with cerebral palsy.
authors.forename: Amur
authors.initials: A
authors.lastname: Almanji
authors.forename: Alex R
authors.initials: AR
authors.lastname: Payne
authors.forename: Robert
authors.initials: R
authors.lastname: Amor
authors.forename: T Claire
authors.initials: TC
authors.lastname: Davies
mesh_terms: D000293:Adolescent; D000465:Algorithms; D002547:Cerebral Palsy / Q000503:physiopathology* / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement / Q000502:physiology*; D017711:Nonlinear Dynamics; D011597:Psychomotor Performance; D015203:Reproducibility of Results; D013647:Task Performance and Analysis; D014584:User-Computer Interface; D055815:Young Adult