Corso Interazione Uomo Macchina e Sviluppo Applicazioni Mobile - GoBus
1. Università degli studi di Salerno
Dipartimento di Studi e Ricerca Aziendale
(Management & InformationTechnology)
Corso di Laurea Magistrale inTecnologie Informatiche e Management
Finalists
Alessandro Longo, Davide De Chiara,
Elisa D’Eugenio, Gemma Catolino
88. Why?
“Usability is like oxygen.You don’t notice it
until it’s missing”
“1 $ spent in usability results in a
return of 30.25 $“
UsabilityTesting Design
Usability and the bottom line [Donahue]
Usability is good business [Donahue et al.]
94. How Verify Usability?
Task Analysis
Empirical Evaluation
choosing a competitor
Nielsen’sTen Usability
Heuristics
95. Visibility of system status
User control and freedom
Match between system and the real world
Consistency and standards
Error prevention
Recognition rather than recall
Flexibility and efficiency of use
Aesthetic and minimalist design
Help users recognize, diagnose, and recover from errors
Help and documentation
99. How Define Tasks?
3 tasks, one for all main functionalities of GoBus!
Search and visualize
stops of a route on the
map
100. How Define Tasks?
3 tasks, one for all main functionalities of GoBus!
Search and visualize
stops of a route on the
map
Search and add routes
to favorites
101. How Define Tasks?
3 tasks, one for all main functionalities of GoBus!
Search and visualize
stops of a route on the
map
Search and add routes
to favorites
Select and show a route from favorites
102. How Measure Usability?
NOS
Number of steps taken by the user
in performing a task
S/T
Seconds required by the user
to perform a task
E/T
Errors made by the user
in performing a task
106. Experimental Design
To reduce the conditioning
factor we used the Within
Group Design
5 Novice users and 5 Expert
users began testing Moovit
107. Organizing Tasks
1) Informative consent
2) Pre-execution Survey
3) Task list
Within Group Design
NOS
S/T
E/T
4) Comprehension Survey
Pre-execution
Execution
Post-execution
108. HOW STORE USER EXPERIENCE?
Organizing Tasks
1) Informative consent
2) Pre-execution Survey
3) Task list
Within Group Design
NOS
S/T
E/T
Pre-execution
Execution
Post-execution
109. Think Aloud WITH FEEDBACK REPORTS
Organizing Tasks
1) Informative consent
2) Pre-execution Survey
3) Task list
Within Group Design
NOS
S/T
E/T
Pre-execution
Execution
Post-execution
125. Confirm Experimental Results
We had to prove that the test results were not
casually derived, applying the OneTail t-test
OneTail t-test is applicable only if you are a
normal distribution of data and the equality of
variance
126. Property Test Passed
Normal distribution of
data
Shapiro-Wilk test
Equality of variances Bartlett test
Confirm Experimental Results