The Simulator Sickness Questionnaire (SSQ) introduced by Kennedy et al. [55] was used as a measure in the simulator sickness experiments of Chapter 6. The symptoms used, and their weightings, are given in Table G (adapted from [55]). The SSQ is based on three components: nausea, oculomotor problems, and disorientation. These can be combined to produce a total SSQ score, as described in Table G.
| Weight | |||
| SSQ Symptom | Nausea | Oculomotor | Disorientation |
| General discomfort | 1 | 1 | 0 |
| Fatigue | 0 | 1 | 0 |
| Headache | 0 | 1 | 0 |
| Eyestrain | 0 | 1 | 0 |
| Difficulty focusing | 0 | 1 | 1 |
| Increased salivation | 1 | 0 | 0 |
| Sweating | 1 | 0 | 0 |
| Nausea | 1 | 0 | 1 |
| Difficulty concentrating | 1 | 1 | 0 |
| Fullness of head | 0 | 0 | 1 |
| Blurred vision | 0 | 1 | 1 |
| Dizzy (eyes open) | 0 | 0 | 1 |
| Dizzy (eyes closed) | 0 | 0 | 1 |
| Vertigo | 0 | 0 | 1 |
| Stomach awareness | 1 | 0 | 0 |
| Burping | 1 | 0 | 0 |
Participants report the degree to which they experience each of the above symptoms as one of ``None'', ``Slight'', ``Moderate'' and ``Severe''. These are scored respectively as 0, 1, 2 and 3. To compute the scale scores for each column, the reported value for each symptom is multiplied by the weight in each column and then summed down the columns. The total SSQ score is obtained by adding the scale scores across the three columns and multiplying by 3.74. Weighted scale scores for each column individually can be found by multiplying the ``Nausea'' scale score by 9.54; the ``Oculomotor'' subscale by 7.58; and the ``Disorientation'' subscale by 13.92.