Week 8
MIR Ch10 User Interface and Visualization
Human computer
interaction
1)
Principle
·
Offer
informative feedback is especially important for information access interfaces.
·
Reduce
working memory load. Information access is an iterative process, the goals of
which shift and change as information is encountered. One key way information
access interfaces can help with memory load is to provide mechanisms for
keeping track of choices made during the search process.
·
Provide
alternative interfaces for novice and expert users. An important tradeoff in
all user interface design is that of simplicity vs power.
2)
Role of visualization
·
Human are highly attuned to images and visual
information. pics can be captivating and appealing, especially if well
designed.
·
The growing prevalence of fast pics processors
and high resolution color monitors is increasing interest in information
visualization.
·
Visualization of inherently abstract information
is more difficult, and visualization of textually represented information is
especially challenging.
3)
Evaluating
·
An important aspect of HCI is the methodology
for evaluation of user interface techniques. Precision and recall measures have
been widely used for comparing the ranking results of non-interactive systems,
but are less appropriate for assessing interactive systems.
·
Empirical data involving human users is time
consuming to gather and difficult to draw conclusion from.
The information access process
1)
Model
of interaction
· Start with an information need
· select a system and collections to search on
· formulate a query
· send the query to system
· receive the results in the form of
information items
· scan, evaluate, and interpret the results
· either stop, or,
· reformulate the query and repeat step 4
2)
Earlier
interface studiesThe bulk of the literature on studies of HCI seeking behavior concerns
information intermediaries using online systems consisting of bibliographic
records.
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