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In conclusion, frequency of latency appears to play a role in the experience of sickness in HMDs in both subjective reporting of symptoms and subject performance. The current study confirms results of earlier studies, finding that real motion around a frequency of 0.2 Hz is more sickening than other frequencies. Future work should continue to parse the effects of frequency and amplitude of latency in head-tracked HMDs. Kinsella A, Mattfeld R, Muth E, Hoover A. Frequency, not amplitude, of latency affects subjective sickness in a head-mounted display. Aerosp Med Hum Perform. 2016; 87(7):604-609.

The purpose of this study was to examine differences in performance and postural sway among individuals performing a task when using and not using a head-mounted display (HMD). Twenty participants completed a repeated measures study in which they performed a simple object location targeting task while using and not using an HMD. Accuracy, time-to-hit, and postural sway were measured. Significant differences in accuracy and time-to-hit were found, indicating participants’ task performance was worse while using the HMD. Significant differences in magnitude of postural sway were found in elliptical area and path length, showing more sway when using the HMD than when not using it. These methods can be used to objectively measure user differences in response to wearing and using an HMD that can result in negative effects for users.

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