chapter 12 observing users li, jia li, wei. outline what and when to observe approaches to...
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Chapter 12 Observing Users
Li, JiaLi, Wei
Outline
What and when to observeApproaches to observationHow to observeHow to collect dataIndirect observationAnalyzing, interpreting and presenting data
Goals and Questions
Provide a focus for observation Example: watch a group of people
First watch: what are they doing? … Second watch: more focused questions
Necessary for all evaluation studies Balance between being guided by
goals and being open-minded
What and When to Observe
During early design of a product Help understand users’ needs
During later refinement of a product Find out whether it meets users’
needs
Type of Observation
Participant observation
(e.g., in ethnography)(Not applicable)Insider
“Quick and dirty”
In field studies
“Quick and dirty”
In usability testing
Outsider looking on
Field environment
(i.e., natural)
Controlled environment
(i.e., lab-like)
Observation
Approaches to Observation
“ Quick and dirty” observationfind out what is happening quickly and with little formality
Observation in usability testingcontrolled environment:
Video, interaction logs Watch through one-way mirror or via remote TV
screen
Observation in field studies
Observation in Field Studies
Levels of participation (By Colin Robson, 1993) Complete participants More marginal participants Observers who also participate Outside observer
Observation in Field Studies - Outside Observer
When an observer is interested only in the presence of certain types of behavior
Example: Observe when a computer is
used by boys and when by girls, and how long
Observation in Field Studies - Inside Observer
Participant observers Participate in the lives of the people under
study Maintain a professional distance that allows
adequate observation and recording of data
EthnographersControversy Participant observation is virtually synonymous
with ethnography Participant observation is a technique used in
ethnography
How to Observe - In Controlled Environments
Issues before observation Decide laboratory to do the tests where
appropriate equipment is set up Test equipment to make sure it works Provide an informed consent form for users to
read and sign at the beginning of the study
ProblemsObservers do not know what users are thinking Think-aloud technique
How to Observe - In the Field
Issues before observation State initial study goal and questions clearly Select a framework to guide activity in the field Decide how to record events Go through notes and other records as soon as
possible Highlight and separate personal opinion from
what really happens
How to Observe - In the Field (Cont’d)
Issues before observation Refine goals and questions while
observation Gain the acceptance and trust of those to
be observed Think about ways to handle sensitive issues Consider working as a team Check notes with an informant or members
of the group Plan to look at situation from different
perspectives
Frameworks
Why use frameworks Provide focus Organize/structure observation
What framework to select A simple framework:
The person The place The thing
Frameworks (Cont’d)
What framework to select Goetz and LeCompte framework
Who is present? What is happening? When does the activity occur? Where is it happening? How is the activity organized?
Frameworks (Cont’d)
What framework to select Colin Robson framework
Space: appearance and lay-outActors: names and relevant detailsActivities: what are they doing and whyObjects: present physical objectsActs: what are specific individuals doingGoals: what to accomplish for actorsFeelings: mood of the group and
individuals
How to Observe – Participant Observation and Ethnography
Issues before observation Identify goal and questions with the
help of observation framework Get immersed in the group to observe Collect a variety of data Get balance between broad picture
and specific questions Analyze data using a holistic approach
DilemmasWhen should I stop observing When see similar patterns of behavior being
repeated When finish listening to all the main
stakeholder groups and understand their perspectives
How can I adapt ethnography to fit the development process Preparation Field study Analysis Reporting
Data collection
Notes plus still cameraAudio recording plus still cameraVideo
Notes plus still camera
Advantages Less technical. Flexible. Equipment easy to
get and not expensive.
Unobtrusive. Easy to transcribe.
Disadvantages Difficult and tiring
to write and observe at the same time.
Writing speed limited.
Less reliable, rely on the note-takers.
Audio plus still camera
Advantages Inexpensive Flexible Relatively
unobtrusive Low disturbance
Disadvantages Lack of visual
record Difficult to
transcribing the data.
Have to change tapes and position microphone .
Video
Advantages Capture both
visual and audio High reliability Permanent
original record that can be revisited.
Disadvantages Equipment more
expensive Intrusive Time-consuming
to analyze the video data
Need positioning and focusing camera lens.
Indirect observation: tracking users’s activities
DiariesInteraction logging
Diaries (1)
What users didWhen they did itWhat they thought about their interactions with the technology
Useful when users are scattered and unreachable
such as: Internet and web evaluations
Diaries (2)
Advantages Inexpensive No special
equipment or expertise
Suitable for long-term studies
Disadvantages Rely on participants
being reliable and remembering to complete the diaries.
Participants often remember events as being better or worse than they really were, or taking more or less time than they actually did.
Interaction logging
Advantages Unobtrusive Large volumes of
data can be logged automatically
Disadvantages Ethical concerns. Powerful tools are
needed.Webtrends
Dilemma --- observing without being seen
They do not know we are watching. Shall we tell them? Tell: users may react or change
their behavior. Depends on the context:
How much personal information is collected?
How the information will be used?
Analyzing, interpreting, and presenting the data
Qualitative data that is interpreted and used to tell “the story” about what was observed.
Qualitative data that is categorized using techniques such as content analysis.
Quantitative data that is collected from interaction and video logs and presented as values, tables, charts and graphs and is treated statistically.
Qualitative analysis to tell a story
Review the data Record the themes Record the date and time Check your understanding Iterate this processReport your findings
Qualitative analysis for categorization
Looking for incidents or patternsAnalyzing data into categoriesAnalyzing discourse
Looking for incidents or patterns
Look for critical incidents, such as times when users were obviously stuck.Theory may also be used to guide the study.A variety of tools are available to record, manipulate and search the data. NIDIST Observer Video-Pro tool
Analyzing data into categories
Content analysis provides another fine grain way of analyzing video data.It is a systematic, reliable way of coding content into a meaningful set of mutually exclusive categories.
Analyzing discourse
Another approach to video and audio analysis is to focus on the dialog.Analyzing discourse on the Internet has started to influence designers’ understanding about users’ needs in these environments.
Quantitative data analysis
Typically this data is further analyzed using simple statistics such as means, standard deviations, etc.
Feeding the findings back into design
Clearly written reports with Overview at the beginning Detailed content list
Verbal presentation