This document outlines objectives and criteria for evaluating the effectiveness and user-friendliness of input and output devices. Effectiveness is defined as a device's ability to facilitate efficient and usable interactions between users and computers. Key aspects of effectiveness include usability, efficiency, user satisfaction, and reliability. User-friendliness refers to how easily users can interact with a device. Easy to use, responsive, clear in error handling, and aesthetically pleasing designs contribute to user-friendliness. The class will be divided into groups to test and evaluate different cellphone interfaces based on these criteria.

1. Usability Testing
of Input-Output Devices
LABORATORY ACTIVITY 1

2. Objectives:
To evaluate the effectiveness and
user-friendliness of various input
and output devices in the context of
Human-Computer Interaction.

3. EFFECTIVENESS--- refers to its ability to facilitate
smooth and efficient interactions between users and a
computer system.
In human-computer interaction (HCI), the effectiveness
of input and output devices is determined by their
ability to facilitate user interactions with a computer
system in a way that is efficient, usable, and

4. EFFECTIVENESS
Usability
• Input Devices: Users should be able to easily and accurately provide input.
For example, a well-designed keyboard should facilitate comfortable and accurate typing.
• Output Devices: The information presented should be clear, easily readable, and relevant to the
user's needs.
Example: Displays, monitors, and other output devices should effectively convey information without
causing confusion.

5. EFFECTIVENESS
Efficiency
• Input Devices: The device should allow users to input information or commands
quickly and without unnecessary delays.
Example: key responsiveness for keyboards or gesture recognition for touchscreens.
• Output Devices: Information should be presented promptly, and the device should
not introduce unnecessary delays.
For example, a printer should produce outputs in a timely manner.

6. EFFECTIVENESS
User Satisfaction
• Input Devices: Users should find the input method comfortable and satisfying to
use. This can involve factors like key feel, touch sensitivity, or the responsiveness of
touchscreens.
• Output Devices: Users should be pleased with the quality of the information
presented. Clarity, color accuracy, and other factors contribute to user satisfaction
with output devices.

7. EFFECTIVENESS
Reliability
• Input Devices: Devices should consistently and accurately register user input.
For example, a mouse should reliably respond to movements and clicks.
• Output Devices: The output should be reliable and free from errors. Printers, for instance,
should produce documents without smudging or misalignment.

8. USER FRIENDLINESS-- refers to how easily
and intuitively users can interact with the
device to input information or receive
output.

9. USER FRIENDLINESS (Ease of Use)
• Input Devices: Users should find it easy to use the input device for tasks such as
typing, clicking, or gesturing. This involves factors like the layout and arrangement of
keys, the sensitivity of touch surfaces, and the intuitiveness of controls.
• Output Devices: Information should be presented in a clear and understandable
manner. Display interfaces, for example, should be designed with an intuitive layout
and navigation.

10. USER FRIENDLINESS (Responsiveness)
• Input Devices: User-friendly input devices respond promptly and accurately to user actions.
For example, a responsive touchpad or mouse immediately reacts to movements and clicks.
• Output Devices: Information should be presented without delays, and the device should
respond quickly to user commands.

11. USER FRIENDLINESS (Error Handling)
• Input Devices: User-friendly input devices provide clear indications when
errors occur, helping users understand and correct mistakes.
• Output Devices: Error messages or notifications should be presented in a
way that guides users to understand and address issues.

12. USER FRIENDLINESS (Aesthetics)
• Input Devices: The physical design of input devices can influence user perception. Devices
with aesthetically pleasing and ergonomic designs may be more user-friendly.
• Output Devices: The visual presentation of information should be aesthetically pleasing and
organized, contributing to a positive user experience.

13. The class will be divided into small groups. Evaluate or test
different brands of cellphones’ user Interface. In terms of
its:
 Effectiveness (Usability, Efficiency, Accessibility, User
satisfaction and reliability)
User Friendliness (Ease of use, Responsiveness, Error
Handling and Aesthetics)
Laboratory Activity: