Course tracker

The VENI, VIDI, VICI Event Model

The VENI,VIDI,VICI model is inspired of the Caesar laconic reporting to the roman senate in 47 before J-C after victory in Zela, as Plutarque reported.

We choosed this reference as being very close the usual learning process we observed on our Moodle platforms.

VENI Event

The VENI event triggers when a participant commes onto a marker attached in the field of a measurable pedagogic element. When the marker passes into the visible area of a user agent, the event is generated. The time the marker was visible must be higher than the internal polling time, which can be adjustable editing the /mod/cousetracking/js/objectVisibility.js file. There is one unique poller per displayed web page for all markers within a resource. The event is sent to database, and will be recorded with effective date and time of detection.

VIDI Event

The VIDI event tries to detect the assumed moment a pedagogical element has been examined py the user. Empirically, we do consider that we can assume a content has been examined if the marker that is at this location has been measured being visible for some amount of time. This remains an asumption, because we don't know the effective attention the user paied to what is presented on his screen, nor we know if he is even in front of the computer during all this time. We must then assume the situation is plausible and sufficiant so we can consider this condition for triggering the VIDI event. It should be actually true with a standard participant.

In its first implementation, we delegate to the author adjusting the VIDI triggering delay. We thought an individual delay was necessary, as content reading may be not performed at the same speed depending on content obviousness, discipline, semantic complexity, and other factors.

Moreover, presence of drawings or diagrams may also speed up or conversely make examination slower. We have to few knowledge to know in which direction exactly.

The VIDI event cannot be sent prior a VENI event. It happens when a continuous visibility duration has been detected, so that multiple come and go upon a marker may never trigger its VIDI situation.

For adjusting the delay, we assume now that factirs that may provoque variations sould be :

  • The element's content type (text, drawing, table, image, formal statement, formated data...)
  • The symbolic or conceptual intrinsic complexity of the element (structure complexity of the drawing, complexity of referential inferences, syntaxic complexity of the statement, language level)
  • The physical size of the object (text length, number of semiotic unities in a drawing)

Further the triggering of the VIDI event can be stored the cumulated reading time for any element, that might have sense on large assistances. By two figures, the one which is watched 10 minutes rather than 15 seconds may have peculiar significance.

VICI Event

The VICI Event tells us about an explicit will of the participant to tell us about he having considered he understood the element. VICI remains under participant's control.

Here must we beware in the meaning we will extract from these events. The student may have a wrong idea of his comprehension. It may also deliberately mark the VICI abusively, fearing a miscondiseration from part of the teacher. The validity of such a signal is still under experimentation.

If we could conclude the signals collected through the VICI concept are fair, we could take advantage of this when constructing assesments for the students, much more efficiently than without any this kind of insight.

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