IMS Global Learning Consortium develops and maintains, among other specifications, the Question & Test InteroperabilityⓇ (QTI) standard. The QTI standard enables the exchange of item, test, and results data between authoring tools, item banks, test constructional tools, learning systems, and assessment delivery systems.
Many products and vendors claim QTI compliance, and even use the QTI name—but that can be misleading. Here’s the fine print: being QTI-compliant isn’t the same thing as being IMS-certified. The requirements for the latter are much more stringent.
QTI Compliant vs. IMS-Certified
With QTI compliance, a product’s implementation and interpretation of the QTI standard are often untested. If you assume interoperability because of the mention of QTI, you might be disappointed. Subsequently, when these untested implementations of QTI-compliant products fail, it gives “interoperability” and standards like QTI a bad name.
IMS Global Learning Consortium conformance certified products are in a class of their own. The IMS Global conformance certification program is a testing program that ensures a product is interoperable and up-to-date with the evolving specifications. According to the official listing in the IMS Certified Product Directory, only two dozen products—and from even fewer organizations (as some have multiple products that qualify as QTI conformance certified)—have made the cut.
In 2014, TAO became the first product to obtain IMS conformance certification for QTI in all four categories: Authoring and Editing systems, Delivery systems, Item and Test bank systems, and most importantly, the QTI content itself. Taken together, they make test content completely portable, which is critical for users who want to migrate from legacy proprietary platforms to open, interoperable environments. Additionally, QTI can be used to create best-of-breed solutions; combining delivery and authoring modules from multiple vendors; where adherence is key in building these learning solutions of the future.
TAO uses QTI as a native format, meaning items are stored in QTI. We don’t only import/export QTI, we store it natively, and therefore item and test editors actually author QTI directly. This means no information is “lost in translation” from a proprietary internal spec to or from QTI. We have been actively working within IMS and the QTI Technical Working groups to assure valid implementations and therefore assure interoperability.
For example: the IMS Global Executive Board on Assessment (which our CTO, Mark Molenaar chaired from 2016 to 2017) organizes regular “plugfests” to verify the vendor implementations, and based on the results improve the implementations and the specification itself (e.g. resolve ambiguities in documentation). Only organizations truly dedicated to the QTI standard participate in these plugfests.
Read our post on connecting assessment to learning using IMS standards for more on interoperability standards and the benefits they provide.