Objective: The aim of the study was to investigate the effect of augmented feedback on participants' workload, performance, and distribution of visual attention.
Background: An important question in human-machine interface design is whether the operator should be provided with direct solutions. We focused on the solution space diagram (SSD), a type of augmented feedback that shows directly whether two aircraft are on conflicting trajectories.
Method: One group of novices ( = 13) completed conflict detection tasks with SSD, whereas a second group ( = 11) performed the same tasks without SSD. Eye-tracking was used to measure visual attention distribution.
Results: The mean self-reported task difficulty was substantially lower for the SSD group compared to the No-SSD group. The SSD group had a better conflict detection rate than the No-SSD group, whereas false-positive rates were equivalent. High false-positive rates for some scenarios were attributed to participants who misunderstood the SSD. Compared to the No-SSD group, the SSD group spent a large proportion of their time looking at the SSD aircraft while looking less at other areas of interest.
Conclusion: Augmented feedback makes the task subjectively easier but has side effects related to visual tunneling and misunderstanding.
Application: Caution should be exercised when human operators are expected to reproduce task solutions that are provided by augmented visual feedback.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8521352 | PMC |
| http://dx.doi.org/10.1177/0018720820924602 | DOI Listing |
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