proving a theory
gaining knowledge in order
to improve a project
Is the new website
better than the
changing protocol afoot
interview with a moderator
measuring the ratio of
successful attempts and
time of performing tasks
no formal collection of
“The information is in the people, not in your head.”
Edward T. Hall
why does it work?
1. Nothing is perfect.
2. Serious problems are usually easy to ﬁnd.
3. Observation of users is always valuable.
N (1-(1- L ) n )
N - amount of all user interface usability problems
L - percent of usability problems found while testing
a single user (typical value L = 31%)
Creation of tasks/task scenarios
1. write down main site functionalities
2. convert them to tasks
3. rewrite them to task scenarios
Task scenarios should be printed x 2 (one bundle for the user,
second for you).
Tester should be sitting in front of the computer.
Observer should not overwhelm the tester.
Optional agreement for test recording.
clean up your browser’s history
set some neutral page e.g. Google
,,We are testing the interface not you.’’
,,Don’t worry about hurting our feelings…’’
not every question requires/needs an answer
user can ask for a break during the test
turn on recording (if the agreement has been signed)
,,The recording will only be used in order to improve the site’s usability.’’
TesT: part 1
1 min. CONVERSATION
quick chat with the user
What do you do in everyday life?
How many hours a day do you spend using the Internet?
What websites do you usually visit?
Do you have any favourite websites?
Test: Part 2
2 min. VALIDATING THE CONCEPT OF LANDING PAGE
User can scroll through the page, but is not allowed to leave/
change the page.
What do you think, who is the owner of this site?
Is there anything drawing your attention immediately?
What can you do on the site?
What is this site about?
“If I asked the people what they wanted, they would
have said ‘Faster Horses’.
Test: part 3
12 min. TASK SCENARIOS
Before starting the task you should read out loud each task
scenario to the tester.
Build a whole story around the task, so that the tester can
easily ‘’ﬁll the described person’s shoes’’.
If the tester can not ﬁnd something important you can help him
in a very discrete way. (this is discouraged)
Always thank the tester afterwards.
You feel a bit under the weather and
would like to consult a doctor, so that he
can evaluate your condition.
List out 3 most serious (according to you) problems with the
Meet up with the project members for lunch and talk through
all perceived by each member (during the test) most serious
Find the easiest way to ﬁx each and every of the 3 most
Implement the improvements!
“The ability to simplify means to eliminate the
unnecessary so that the necessary may speak.”
Remember! Performing quick usability tests is
always better than not doing anything at all.