Purchase this article with an account.
I.U. Scott, W.J. Feuer, J.A. Jacko, F. Sainfort, V.K. Emery, T. Kongnakorn, K.P. Moloney, B.S. Zorich; The Impact of Auditory and Haptic Feedback on Computer Task Performance in Patients With Age-Related Macular Degeneration and Control Subjects With No Known Ocular Disease . Invest. Ophthalmol. Vis. Sci. 2003;44(13):1790.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Purpose: To investigate the impact of auditory and haptic feedback on computer task performance of patients with decreased vision due to age-related macular degeneration (AMD) compared to control subjects with no known ocular disease. Methods: Thirty patients with AMD and 28 similarly aged control subjects with no known ocular disease completed a series of timed computer graphical user interface icon "drag and drop" tasks with and without auditory and haptic feedback. Auditory feedback constituted a "sucking" sound when the icon was correctly positioned to be "dropped"; similarly, haptic feedback was a vibration generated by the mouse. Each subject was tested under all four possible conditions of presence or absence of auditory and haptic feedback in a two-factor repeated measures design. The order of presentation of feedback conditions was determined randomly. The mean task completion time was quantified using the final target highlight time (FTHT), measured in milliseconds. Patient recruitment was stratified into three groups by best-corrected visual acuity in the best eye: (1) 20/20 - 20/50, n=12; (2) 20/60 - 20/100, n= 8; and (3) 20/100 or worse, n=10. All control subjects had best eye vision of 20/30 or better. Improvements in task completion time were analysed with repeated measures analysis of variance. Results: The age [mean ± standard deviation] and gender [# (%) female] composition of the three patient groups and the control group were, respectively: 77±7, 8 (67%); 82±7, 3 (38%); 79±10, 7 (70%); and 74±6, 17 (61%). The mean ± standard deviation FTHT (ms) with neither auditory nor haptic feedback in the groups were: 1110 ± 356, 1682 ± 1069, 1763 ± 831, 938 ±538 (p=0.003). Auditory feedback improved performance [% FTHT decrease, p-value] in all groups including the controls, respectively: 18%, p=0.018; 38%, p=0.054; 57%, p=0.001; 19%, p=0.001. Haptic feedback improved performance in the worst acuity AMD group and the controls: 46%, p=0.009; 17%, p=0.038. Conclusions: Auditory and haptic feedback can dramatically increase performance speed of computer "drag and drop" tasks performed by patients with AMD, particularly in those individuals with the most compromised vision.
This PDF is available to Subscribers Only