Table 4

Incidence of non-zero responses for the self-reported Subjective Units of Discomfort (SUDS) and Simulator Sickness Questionnaire (SSQ) subscales and total score, as a function of trial number. Mean incidence, χ2 test of association, and p value are also provided. No significant effect of trial number was found.
Trial
 SUDS
 SSQ:Nausea
 SSQ:Oculomotor
 SSQ:Disorientation
 SSQ:Total
0 (initial)
 4
 7
 11
 0
 11
1
 17
 6
 15
 2
 15
2
 24
 9
 24
 11
 31
3
 28
 13
 28
 2
 30
4
 30
 13
 31
 6
 33
5
 26
 15
 35
 6
 37
6
 30
 15
 39
 7
 41
7
 32
 15
 38
 8
 40
8
 34
 17
 40
 8
 40
Mean
 25
 12
 29
 5
 31
χ2
 15.0
 5.2
 16.0
 8.0
 16.2
p-value
 .06
 .73
 .04
 .43
 .04

Sparto et al. Journal of NeuroEngineering and Rehabilitation 2004 1:14   doi:10.1186/1743-0003-1-14