Supporting ElementaryAge Childrens Searching and Browsing: Design and Evaluation Using the Internati - PowerPoint PPT Presentation
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Supporting ElementaryAge Childrens Searching and Browsing: Design and Evaluation Using the Internati
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H1: flat interface supports boolean search better than hierarchical interface ... Boolean search must be implemented with care. Navigation tools must be large ... – PowerPoint PPT presentation
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Title: Supporting ElementaryAge Childrens Searching and Browsing: Design and Evaluation Using the Internati
1
Supporting Elementary-Age Childrens Searching
and Browsing Design and Evaluation Using the
International Childrens Digital Library.
- Hilary Browne Hutchinson, Allison Druin and
Benjamin B Bederson
2
Motivation (1)
- Childrens website usually have one or more of
three problems - 1 - They do not take into account information
processing and motor skills of children (ie.
small objects). - 2 - They do not take into account searching and
browsing skills (ie. making keyword queries).
3
Motivation (2)
- 3 They do not consider how children prefer to
search, presenting search criteria for adults and
not for children.
4
Two systems (Hierarchical)
- 14 categories navigated sequentially
- 1 catergory at a time
- select a leaf for a search
- but backtracking needed for Boolean queries -gt
children barely use this on their own
5
Two systems (Flat)
- 44 categories simultaneously over 2 pages
- Carefully selected categories specifically for
children - Big icons
- but might be visually overwhelming
6
Experiment Tasks
- Two study types simple and Boolean search
- 4 tasks
- - free browsing before instruction
- - searching task (for both types)
- - comprehension questions
- - subjective questions
7
Experiment Subjects
- 72 first-grade, third-grade and fifth-grade
children - 12 per group, 36 per study type
8
Hypothesis
- H1 flat interface supports boolean search better
than hierarchical interface - H2 flat interface would be faster than the
hierarchical interface for simpel non-paging
searches - H3 flat interface would be faster and require
fewer hints than the hierarchical interface for
Boolean searches
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Hypothesis (2)
- H4 flat interface would be easier, more likable
and preferred to the hierarchical interface - H5 Boolean searches would be harder for younger
children to complete than for older children
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Discussion
- H1 number of Boolean searches during browsing
suggest flat interface supports those searches
better - H2 flat interface is faster for simple,
non-paging searches - H3 flat interface is faster and requires less
hints for Boolean searches
11
Discussion (2)
- H4 for simple searches neither interface was
liked more, easier to use or preferred, but for
Boolean searches the flat interface was liked
more, easier to use and preferred. - H5 in the boolean study, older children
understood that they were creating a conjunctive
Boolean search more often than the younger
children.
12
Design Guidelines
- Both flat, simultaneous and hierarchical,
sequential designs are useful for single-item
searches. - Flat, simultaneous designs support better
conjunctive Boolean searching and browsing. - Boolean search must be implemented with care.
- Navigation tools must be large and prominent.
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