Date post: | 11-Jun-2015 |
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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
• CASUS• MVP standard• Implementation in CASUS• Challenges• Scenarios• Conclusions
Overview
• 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
CASUS Player
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]
MVP standard
linear Case progress
DAMNode
ActivityModelDataAvailabilityModel
ActivityNode
ActivityNode
ActivityNode
ActivityNode
VPDText
VPDText
VPDText
Xtensibleinfo/VPDText
VPDText
VirtualPatientData
No specialized fields are used, only VPDText
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)
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 ...
• 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
• = 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
• Implementation of Answers • Import of branched VPs• Import of highly structured VPs
Challenges
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
Challenges – Import of highly structured VPs
WEB-SP VP
• 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
Challenges
VPDText
• 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?
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
• 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
More information:
www.casus.eu
www.virtualpatients.eu
Thank you!