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Introduction to User Experience Design
Introduction
A user uses an Interface to accomplish a task.
Factors affecting Adoption of a system
Individual level
Group level
Goal
Design interfaces that are useful and usable.
— Useful means that it allows the user to accomplish the task
— Usable means the effectiveness, efficiency and satisfaction with which users can achieve the tasks.
— Easy to understand
Design Cycle
Features of a Good Design
Affordances
Affordances refer to the perceived and
actual properties of the things, primarily those fundamental properties
that determine just how things could possibly be used.
If you look at your smart phone we see all sorts of features for example,
buttons, buttons are for pressing,
the idea is that the affordance of the thought is to press.
Signifiers
Marks or sounds which tell us which actions are possible. For eg keyboards on a smartphone
Feedback
Sending back info to user for a particular action
User Engagement Ethics
Good design is data driven process
Engagement is a 3 part process.
User session vs research
Research is generally with the goal for reporting and presenting in conferences etc.
Requirement Gathering
Goal: Understand the problem space
Types of Data
Quantitative: Info in numbers eg surveys in spreadsheets (gives what )
Qualitative: Thematic info, narrative, interviews (gives why)
Mixed method approach: collect both types of data
Types of Users
Users as stakeholders
Primary → Use the design directly, end users
Secondary → Use the design indirectly, may get some output from it
Tertiary → May not use the design at all, but may be effected by it
Think about all stakeholders while designing
Design Technique Overview
Use couple of these techniques
User Results
Descriptive Statistics
Range, Median, Mean of data set
User Characteristics
Highlight important aspects of data collected, tabular summary
-------------------------------------------
| | Teen | Middle Age | Old Age |
| Age | 12-25 | 26-55 | > 56 . |
| Sex | | | |
|Education | | | |
--------------------------------------------
Personas
Storyline which high lights all important aspects
Presenting Results
Scenarios: Present a storyline
Essential Use case: gives system requirments
Hierarchical Task analysis: Goal with underlying steps to reach there
Current UI Critique: Tell what is good and what can be improved
Prototyping
A early model of an novel design
Low fidelity: little similarity to final design
High fidelity: high similarity to final design
Prototyping also helps in managing resources, iterate on the design
Table 1
Horizontal Prototype
Vertical Prototype
Model the breadth of the design features
model few feature with depth
There are no rows in this table
Low fidelity:
High fidelity
Other Techniques
Evaluation
Data driven process, collect qualitative or quantitative data.
Usefulness:
Efficiency
Satisfaction
Related to each other
All evaluation in comparable to for eg status quo
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