Post on 15-Apr-2017
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A Comparative Study of Visual Cues for Annotation-Based Navigation Support in Adaptive Educational Hypermedia
Roya Hosseini & Peter Brusilovsky {roh38,peterb}@pitt.edu
Visual Cues in Past Work Annotation Design Choices The Study Findings
A2
A3
Knowledge-based Annotation
Recommendations
C1A1
C1A2
C1A3
C2A1
C2A2
C2A3
Task 1: Finding Least/Most Known Lines +
Task 3: Finding Recommended Lines +
Visual Cues Were Perceptually Different
User Preference Changed in Task Context
B1A1
B1A2
B1A3
B2A1
B2A2
B2A3
History-based Annotation
NavEx: Fillable Shape
Progressor: Red-to-Green Gradient
Mastery Grids: Green Color Intensities
WebEx: Check Mark Annotation
The plots show that the percent of subjects favoring a design changed before and after performing Task 1, Task 2, and Task 3.
….
33.54
4.55
A1 A2 A3
3.5
4
4.5
5
B1 B2
3.5
4
4.5
5
C1 C2
20
40
60
80
Before After --
A1A2A3
20
40
60
80
100
Before After
B1B2C1C2
The plots show predictive margins of designs’ preference score with 95% CI, for 30 subjects.
Design A1, B2, and C2 received significantly higher preference scores compared to other designs in their group.
Preference score was calculated by aggregating responses over all questions in each questionnaire.
The top designs A1–B2–C2 identified in out-of-context evaluation increased their standing above other designs during in-context evaluation.
Task 2: Finding Clicked Lines +
A1 Most Efficient Design
Most Efficient Design
Most Efficient Design