IB Design Technology Topic A1.1: Ergonomics Questionbank

(b) Explain how adjustability in the chair design supports a wider range of users.

(d) Discuss how the monitor arm in Figure 2 can be adjusted for optimal visual ergonomics.

(e) Explain how anthropometric and physiological considerations are applied in the design of the keyboard and mouse.

What is psychology most concerned with in user-centred design?

A bank is positioning the screen and keypad of a new cash machine so that wheelchair users can operate it. A seated wheelchair user has a lower eye level and a shorter, lower forward reach than a standing adult.

Which anthropometric response follows?

The figure shows a smartphone. Two phones on sale have almost identical functions and prices, yet one greatly outsells the other. Its designers chose the colour, shape, materials, surface finish and the way the screen lights so that the phone appeals to a particular group of buyers.

Which human-factors area does this use of the senses to influence buying belong to?

Minimize fatigue and physical strain during prolonged use

Ensure products are aesthetically pleasing to users

Understand how form affects emotional response

Reduce cognitive workload under time pressure

(a) Figure 1

Identify two ergonomic features of the chair that enhance comfort.

(c) Figure 2

Outline two physiological and two psychological benefits of a height-adjustable desk for users.

(f) Referencing Figures 1, 2, and 3, evaluate how the combination of the chair, desk, and keyboard/mouse system demonstrates the application of ergonomic principles in a modern home office setup.

Signal processing in smart systems

Study of how users think and sense products

Data encryption for user safety

Muscle activation thresholds

Position the controls for the 95th percentile standing reach, so tall users are comfortable

Position the controls for the average standing adult, since most users stand

Position the controls within the lower, shorter reach of a seated wheelchair user, so they fall inside that reach envelope

Ignore reach, because a cash machine is used only briefly

Anthropometrics, because the phone is sized to the hand

Clearance, because the phone must fit in a pocket

Static data collection, because the designers measured the phone

Psychology, because the design meets the user's psychological and sensory responses, not only function