Exam (elaborations)
INF1520 Assignment 3 Complete Solutions 2024 Submission Due by July 15 2024
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Exam of 22 pages for the course Human Computer Interaction I at University of South Africa (Accurate solutions)
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INF1520Assignment 3
Complete Solutions
2024 Submission
Due by July 15 2024
, INF1520 Assignment 3 Complete Solutions 2024
Submission Due by July 15 2024
Question 1 [13]
1.1 Explain why the keys on a computer keyboard are
arranged in the order of QWERTY. (4)
The QWERTY keyboard layout was designed by Christopher
Sholes in the 1860s for early mechanical typewriters. Its
arrangement, known as QWERTY due to the first six letters on
the top row, was primarily crafted to address mechanical
limitations of early typewriters:
1. Mechanical Design: Sholes arranged the keys to prevent
jamming by separating commonly used letter pairs that
were adjacent on the keyboard. This layout slowed typists
down, reducing the likelihood of jamming the mechanical
typebars.
2. Typing Efficiency: Despite QWERTY not being optimized
for modern typing speeds, it was designed to balance the
workload between the left and right hands of typists,
aiming for smoother and more efficient typing once users
became accustomed to the layout.
3. Historical Adoption: As the first commercially successful
typewriter adopted this layout, it quickly became the
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, standard. Over time, its widespread use entrenched
QWERTY as the default keyboard layout for typewriters
and later computers.
4. Continued Use: Despite alternatives like the Dvorak and
Colemak layouts being designed for improved efficiency
and comfort, QWERTY's familiarity and existing
infrastructure have maintained its dominance in the
keyboard market.
In essence, the QWERTY layout's origins lie in addressing
mechanical limitations and balancing typing efficiency, leading
to its historical adoption and continued use in modern keyboards
and devices.
1.2 There are, potentially, many mistakes that designers
can make when designing interfaces. Specify what
are the most problematic mistakes designers make.
(3)
Ignoring User Needs: Designers may fail to conduct
thorough user research, resulting in interfaces that do
not meet the actual needs and preferences of their target
audience.
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