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Dual-task interference while receiving information on a head mounted display and manual tracking with and without

Matthew D Ward¹, William S Helton²

¹University of Canterbury, Christchurch, Canterbury, New Zealand.

Applied Ergonomics

|February 15, 2022

Summary

Dual-task interference occurs when using head-mounted displays (HMDs) during manual control tasks. Auditory warnings did not consistently improve performance, and reaction times worsened when task events coincided with HMD information.

Keywords:

Attention Auditory alerts Dual-task Head-mounted display Mobile Tracking Wearable

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Area of Science:

Human-Computer Interaction
Cognitive Psychology
Ergonomics

Background:

Head-mounted displays (HMDs) present challenges for users performing manual control tasks due to dual-task interference.
Auditory warnings are a potential method to mitigate HMD-related multitasking deficits, but their effectiveness is unclear.

Purpose of the Study:

Investigate the dual-task interference between word memory tasks presented on HMDs and manual tracking.
Examine the impact of auditory warnings on performance during these dual-task scenarios.

Main Methods:

Participants completed tracking, word memory, and combined tasks, with and without auditory warnings.
Dual-task conditions included pairing word presentations with tracking task changes to assess perceptual interference.

Main Results:

Significant dual-task costs were observed in both tracking accuracy and word recall.
Reaction times to critical events were slower when concurrent with HMD word presentations.
The effect of auditory warnings on tracking performance was complex and not uniformly beneficial.

Conclusions:

Cognitive dual-task interference persists with transparent HMDs during manual control tasks.
HMD use in time-critical operations should be limited; further research is needed on auditory warnings' utility and potential task disruption.