Graphics Annotation Usability in elearning Applications

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1 Graphics Annotation Usability in elearning Applications Dorian Gorgan, TeodorŞtefănuţ Computer Science Department Technical University of Cluj-Napoca

2 Contents Objectives Graphics annotation techniques etrace platform Knowledge assessment Usability evaluation Experiments Measurements Results Conclusions January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

3 Objectives I-Trace Project Study the requirements and specifications for graphics pen annotation based elearning environments User requirements (i.e. professor, students), elearning environment functional specifications, usability requirements, lesson structure, user interaction techniques. Adapt and integrate graphical annotation capabilities in etrace elearning framework Develop etrace elearning environment, design and implement the client-server architecture, resource management, security, annotation model, annotation persistence. Integrate graphical interaction techniques in teaching materials Develop lessons in various domains including Computer Science, Medicine, Physics, Mathematics, Algorithms, Computer Graphics. Usability evaluation for graphics annotation techniques Design and produce evaluation instruments for pen and mouse based graphics annotation; Develop test cases for graphics annotation according with usability requirements and specifications. Usability measurements, analyse data, usability evaluation. Disseminate the results on usability tests and lesson development Conference (PLT007, CBMS007, RoCHI007), Web sites (I-TRACE, etrace), technical reports. January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

4 Objectives Usability evaluation Design and produce evaluation instruments for pen and mouse based graphics annotation Develop test cases for graphics annotation according with usability requirements and specifications Usability measurements Data visualization and analysis Usability evaluation January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

and D annotation techniques January, 007

5 Graphics annotation techniques D graphical annotation techniques on text, images, and documents D graphical annotation techniques for D objects D graphical annotation techniques on D objects E-learning framework based on D and D annotation techniques January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

6 etrace Platform etrace elearning Environment based on graphics annotation Developed at the Technical University of Cluj-Napoca (UNI-CLUJ) Developed through the I-TRACE Project Interactive Tracing and Graphical Annotation in Pen-based e-learning, -CP-I-00-IT-Minerva-M (00-007) ITrace project: etrace references: etrace elearning Environment: etrace presentation: January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 6

7 etrace Platform Experiment the annotation techniques on D and D scenes Support annotation independence against document type (text, image), format and D scene description Annotation modeling User interaction techniques Annotation description and communication Synchronization between object and annotation Annotation processing and interpretation Persistence among working sessions and users Visualization Security Integration into e-learning lessons Implementation and experimentation of the annotation techniques in e-learning applications January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 7

8 etrace Graphics Annotation elearning Environment January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 8

9 etrace Graphics Annotation Based Lessons January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 9

10 etrace Graphics Annotation Based Lessons January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 0

11 etrace Graphics Annotation Based Lessons January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

12 Usability evaluation Evaluation methodology. Usability attributes. Scenario efficiency of the pen related annotation, number of errors by drawing a symbol, precision, and graphics quality user actions, the objects and the text which are subject of the annotation. Measurement method parameters which are to be measured (e.g. execution time), the measurement and recording approach (e.g. automatically). Evaluation criteria assessment approach, and the parameter value range for normal, accepted and critical cases January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

13 Experiments 7 exercises of etrace lessons D graphics annotation in the context of etrace lessons Group of 0 users women and men, - years, -0 experimented users Measurements: Runtime: Execution Time Off-line: Aspect, Number of Errors Usability estimation: Usability Aspect / Time x Number_of_Errors) Experiment cases: Pen vs mouse Selection Drawing Handwriting... January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

Experiments - Exercises Other exercises (7): http://users.utcluj.

14 Experiments - Exercises Other exercises (7): January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

15 Measurements January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007

16 Measurements and Results User Time [sec] mouse pen Omission Errors mouse pen Time x Errors mouse pen Usability measurements for individual selection by contour (Exercise ) Ex - Time x Errors Mouse Poly. (Mouse) Pen Poly. (Pen) January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 6

17 Measurements and Results User Time [sec] Wrong inclusion Time x Errors Usability measurements for group selection by contour (Exercise ). mouse pen mouse pen mouse pen Ex - Time x Errors Mouse Poly. (Mouse) Pen Poly. (Pen) January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 7

18 Measurements and Results User Time [sec] mouse pen Errors mouse pen Aspect mouse pen Aspect / (Time x Errors) mouse pen Usability measurements for gesture drawing (Exercise ) Ex - Aspect / (Time x Errors) Mouse Poly. (Mouse) Pen Poly. (Pen) January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 8

19 Conclusions Free forms of expression New types of questions and answers in the elearning applications Visual free form answer provides support for creativity, flexibility, imagination, and artistic ability Annotation based interaction techniques must be designed according with the characteristics of each interaction device The assessment of the annotation quality has a significant impact on the quality of the answer Automatically evaluation of the annotation based answer January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 9

20 Future work Usability of the D annotation techniques Develop automatically techniques for knowledge assessment in graphics annotation based lessons Multi user sessions Real time communication Develop graphics annotation lessons in various domains Propose technical specifications for standards concerning with. Graphical annotation model. User interaction techniques. Automatically knowledge evaluation January, 007 Pen-based Learning Technologies Workshop, Catania, - May, 007 0

21 Questions Thanks Dorian Gorgan, TeodorŞtefănuţ Computer Science Department Technical University of Cluj-Napoca

Knowledge Assessment Based on Evaluation of 3D Graphics Annotation in Lesson Context

Knowledge Assessment Based on Evaluation of 3D Graphics Annotation in Lesson Context Dorian Gorgan, Teodor Stefanut, Madalina Veres, Istvan Gabos Computer Science Department Technical University of Cluj-Napoca