| Date | November 2020 | Marks available | 3 | Reference code | 20N.2.SL.TZ0.3 |
| Level | SL | Paper | 2 | Time zone | no time zone |
| Command term | Explain | Question number | 3 | Adapted from | N/A |
Question
With the growth in virtual reality (VR), augmented reality (AR) and mixed reality (MR)* there has been an increasing interest in virtual interaction design.
Mixed reality interfaces can be accessed by the user through wearing mixed reality glasses. The software maps the physical environment and matches the size of the virtual interface to the size of the user’s hand.
Figure 6 and Figure 7 show a user interacting with virtual menus linked to physical objects in the environment.
Figure 6: Images provided with permission from Ultraleap.
* mixed reality (MR): overlays and anchors virtual objects to the real world
Explain one physiological benefit to the user of interactions through a mixed reality interface instead of a physical interaction with the product.
Markscheme
reduced fatigue/improved biomechanics;
as interface requires less physical effort/less force;
allowing greater productivity/less risk of harm to the user (when working over long periods of time);
enhanced comfort;
as the software maps the size of the user's hand (and physical environment);
to automatically scale the interface/reduce reach;
Award [1] for identifying a physiological benefit to the user of interactions through a mixed reality interface instead of a physical interaction with the product and [1] for each subsequent development of that physiological benefit up to [3 max].
Examiners report
A somewhat complex question in which many candidates were only able to achieve 1 mark or 2 if they understood the relationship to comfort and fatigue.
Syllabus sections
- 20N.1.HL.TZ0.2: Which of the following is a biomechanical consideration? A. Torque B. Alertness C. Static...
- 18N.1.SL.TZ0.4: What is the name given to a twisting force in terms of biomechanics? A. Torque B....
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22M.2.SL.TZ0.7d:
Explain how the study of human factors can be used to improve the comfort, safety and performance of the handset that controls the drone.
- 19M.1.SL.TZ0.3: What would be the likely physiological consequences of working in an environment that is too...
- 20N.1.SL.TZ0.3: Which of the following is influenced by perception? A. Biomechanics B. Strength C. Thermal...
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18M.1.SL.TZ0.3:
A designer wants to reduce the strength it takes to use a tap.
Which of the following designs shown in Figure 1 provides the best mechanical advantage?
Figure 1: A range of taps
[Source: Momentmal / Pixabay] [Source: Unsplash]
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18M.1.HL.TZ0.2:
What physiological factor are the designers attempting to address in the creation of the Wow-pen mouse shown in Figure 1?
Figure 1: A Wow-pen mouse
[Source: brollymedia/iStock]
A. Endurance
B. Biomechanics
C. Tolerance
D. Comfort and Fatigue
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21N.2.SL.TZ0.1b.i:
Describe how biomechanical data would have been used in the development of the forceps in Figure 1.
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19N.2.SL.TZ0.1c.ii:
Explain one physiological factor considered in shoe sole design.
