INF1520 – Assignment 3
Comprehensive Response
Due: 2025
Question 1 [13]
1.1 QWERTY Keyboard Arrangement (4)
The QWERTY layout was developed in the 1870s for mechanical typewriters to
minimise jamming by separating frequently paired letters, rather than to maximise typing
speed (Norman, 2013). Despite no longer being mechanically necessary, it persists due
to historical inertia (Preece et al., 2015). This reflects path dependency, where past
design choices constrain future innovations.
1.2 Problematic Designer Mistakes (3)
Common designer errors include:
• Ignoring User Needs – Designing based on personal preference rather than
user research (Preece et al., 2015).
• Information Overload – Presenting excessive options, increasing cognitive load
(Norman, 2013).
• Inconsistent Elements – Inconsistent icons, labels, or layouts hinder learning
(Shneiderman et al., 2016).
1.3 Common User Design Mistakes (6)
When users design interfaces, mistakes include:
• Neglecting Consistency – Inconsistent navigation confuses users.
• Poor Feedback – Lack of clear system responses reduces user control
(Shneiderman et al., 2016).
• Weak Error Handling – Unclear error messages prevent recovery and frustrate
users.
Comprehensive Response
Due: 2025
Question 1 [13]
1.1 QWERTY Keyboard Arrangement (4)
The QWERTY layout was developed in the 1870s for mechanical typewriters to
minimise jamming by separating frequently paired letters, rather than to maximise typing
speed (Norman, 2013). Despite no longer being mechanically necessary, it persists due
to historical inertia (Preece et al., 2015). This reflects path dependency, where past
design choices constrain future innovations.
1.2 Problematic Designer Mistakes (3)
Common designer errors include:
• Ignoring User Needs – Designing based on personal preference rather than
user research (Preece et al., 2015).
• Information Overload – Presenting excessive options, increasing cognitive load
(Norman, 2013).
• Inconsistent Elements – Inconsistent icons, labels, or layouts hinder learning
(Shneiderman et al., 2016).
1.3 Common User Design Mistakes (6)
When users design interfaces, mistakes include:
• Neglecting Consistency – Inconsistent navigation confuses users.
• Poor Feedback – Lack of clear system responses reduces user control
(Shneiderman et al., 2016).
• Weak Error Handling – Unclear error messages prevent recovery and frustrate
users.
