2_[o43]_hege
DESCRIPTION
Inga Hege, from LMU Munich, Germany, discusses the implementation of the MedBiquitous Standard into the Virtual Patient learning system CASUS.These slides were presented at the International Conference on Virtual Patients 2009, in Krakow, Poland.TRANSCRIPT
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Implementation of the MedBiquitous Standard into the
learning system CASUS Inga Hege – LMU MunichAndrzej Kononowicz - Jagellonian UniversityMichael Pfähler – LMU MunichMartin Adler - Instruct AG
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• CASUS• MVP standard• Implementation in CASUS• Challenges• Scenarios• Conclusions
Overview
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• Developed at LMU since 1993, distributed by instruct • Linear case-based learning system• 9 different question types with quantitative and qualitative feedback• Optional Expert comments and Hyperlinks for additional content• Player in 6 languages• Reporting and analysis of students results• Currently about 1000 VPs (in 8 languages) in database• About 1000 cases session daily, 130 faculties• SingleSignOn to other systems (e.g. LMS) via AICC, Shibboleth
CASUS
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CASUS Player
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MVP standard
VPD: provides the personal and clinical data relevant to the clinical scenario being simulated.
VPD: provides the personal and clinical data relevant to the clinical scenario being simulated.
Media Resources: all of the images, animations, videos, audio files and any other digital objects
Media Resources: all of the images, animations, videos, audio files and any other digital objects
DAM: expresses the aggregation of VPD and MR elements for exposure through the AM.
DAM: expresses the aggregation of VPD and MR elements for exposure through the AM.
AM: encodes what the learner can do and how they engage with the virtual patient.
AM: encodes what the learner can do and how they engage with the virtual patient.
[MVP 09]
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MVP standard
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linear Case progress
DAMNode
ActivityModelDataAvailabilityModel
ActivityNode
ActivityNode
ActivityNode
ActivityNode
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VPDText
VPDText
VPDText
Xtensibleinfo/VPDText
VPDText
VirtualPatientData
No specialized fields are used, only VPDText
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Metadata
CASUS VP metadata (authoring view)
LOMLearning ObjectsMetadata
Metadata – provides information about, other data managed within an application or environment (e.g. name, author, size, data type)
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Challenges
• Implementation of questions– important component of a Casus VP
• Example: case of Mr. Angermeier
– 47,69% on text content (this case contains with questions 22.730 characters {without spaces} after removing questions 11.889)
– 8 out of 29 cards ceased to exist
Almost 50% of the case is lost after removing questions and their feedback
-> Assessment items are not supported in the MVP standard-> but two solutions ...
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• 9 different question types• Multiple/Single Choice (MC)• Freetext (rated and non-rated), Cloze• Sorting, Mapping• Lab values• Underline• Long Menu• Differential diagnostic network tool
•-> Implementation of QTI in MVP by
the XtensibleInfo element in VPD
Questions in CASUS
Differential diagnostic network
Long-Menu Questions
Correct answers
Distractors
Schuwirth LW, van der Vleuten CP, Stoffers HE, Peperkamp AG. Computerized long-menu questions as an alternative to openended questions in computerized assessment. Med Educ.1996;30(1):50-5.
>500
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• = Question and Test Interoperability specification• Defines an information model and associated binding that can be used to represent and exchange assessment items.• Limitations:
• QTI > 1.2 unstable (QTI 2.1 withdrawal/reposted)• Lack of standard support for specific question types (e.g. Long Menu) Extension proposals: M.Pfähler, M. Holzer, An extension to the QTI standard to support long menu items and specific metadata in QTI 2.1, GMS Medizinische Informatik, Biometrie und Epidemiologie 2009, Vol. 5(1), ISSN 1860-9171
-> VPs for assessment can be shared using QTI
IMS QTI
Import/Export of QTI questions in CASUS is optional
CASUS’ QTI questions in Heidelberg’s CAMPUS system
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• Implementation of Answers • Import of branched VPs• Import of highly structured VPs
Challenges
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NodeNode
NodeNode NodeNode
NodeNode NodeNodeNodeNode
NodeNode
NodeNode
NodeNode
NodeNode
NodeNode
NodeNode
Branched VP Linear VP
NodeNode
Challenges -Import of branched VPs
Our solution: •Import of all nodes in a linear order• Display of available next nodes and marking of start node and end nodes.-> Author can decide how to re-structure VP
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Challenges – Import of highly structured VPs
WEB-SP VP
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• Implementation of Answers • Import of branched VPs• Import of highly structured VP• Tracking of changes in VPs • Textstyles need filtering to exchange correctly and match the standard• Image maps with Hyperlinks -> XtensibleInfo• Hyperlinks to text elements/images/movies
Challenges
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Challenges
VPDText
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• Exchange and communication between systems• Access to teaching resources in different systems• Use of learning resources independently from the original system• Content is still accessible if a system is not supported any longer or in case of system change
Why Standards?
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Scenarios
Wiki systemWiki system
- Printing- Backup- Standalone/local VP
Casus Exam toolCasus Exam tool
Assessment Item DatabaseAssessment Item Database
QTI
Other systems implementing MVP
Other systems implementing MVP
VP duplication
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• MVP and other standards can be more than an exchange format for VPs• QTI is a good starting point to exchange assessment items • Import from branched and highly structured systems needs further improvement (e.g. a graphical interface)• CASUS does not fit 100% into the MVP Standard -> didactical value preserved?
Conclusions
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More information:
www.casus.eu
www.virtualpatients.eu
Thank you!