ITEC 3230 Lecture Notes - Design Of Experiments, Electronic Signatures In Global And National Commerce Act, Usability

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Published on 17 Apr 2013
School
York University
Department
Information Technology
Course
ITEC 3230
Page:
of 16
INTERACTION DESIGN
Evaluation: Usability Testing and Field Studies
1
USABILITY TESTING
Involves recording performance of typical
users doing typical tasks.
Controlled environmental settings.
Users are observed and timed.
Data is recorded on video & key presses
are logged.
The data is used to calculate performance
times, and to identify & explain errors.
User satisfaction is evaluated using
questionnaires & interviews.
Field observations may be used to provide
contextual understanding.
2
USABILITY TESTING CHARACTERISTICS
Goals & questions focus on how well users
perform tasks with the product.
Comparison of products or prototypes
common.
Focus is on time to complete task & number
& type of errors.
Data collected by video & interaction
logging.
User satisfaction questionnaires &
interviews provide data about users’
opinions.
3

Document Summary

Data is recorded on video & key presses. Field observations may be used to provide are logged. times, and to identify & explain errors. questionnaires & interviews. contextual understanding. Goals & questions focus on how well users perform tasks with the product. Focus is on time to complete task & number. Data collected by video & interaction common. logging. User satisfaction questionnaires & interviews provide data about users" opinions. Experiments test hypotheses to discover new knowledge by investigating the relationship between two or more things i. e. , variables. Developers check that the system is usable by the intended user population for their tasks. Experiments may also be done in usability testing. Tasks usually last no more than 30 minutes. The test conditions should be the same for every participant. Informed consent form explains procedures and deals with ethical issues. Time to complete a task after a specified time away from the product. Number of users making a particular manuals. error. successfully.