Social, Personalized Lifelong Learning - E-Infrastructures and Technologies for Lifelong Learning - page 112

Presentation Model IMPLEMENTING ADAPTIVE

E-LEARNING 2.0

The presentation model in Figure 2 has the role to
decide what, where and how something is being
shown to the user.
Definition 35: The presentation model PM is
formed by the set of all presentation maps ( PM
⊆

In the following, we illustrate the definitions of the
Social Layer for a specific new system developed
at the University of Warwick - the MOT 2.0 sys-
tem, an adaptive Web 2.0 authoring and delivery
system for adaptive hypermedia, first mentioned
in (Ghali et al ., 2008a). MOT 2.0 is loosely based
on the MOT 1.0 authoring system for adaptive
hypermedia (Cristea & De Mooij, 2003), but it
goes beyond it, as it not only incorporates social
aspects, but it also, by removing the boundary
between authoring and learning, becomes both
an authoring as well as a delivery system.
Figure 3 illustrates the fact that the social user
model (as defined in definitions 19-28) captures
the results of all actions the users made using
MOT 2.0; these action results including which
groups the user has already subscribed to, what
modules the user has created/edited, and what tags
the user has already used and for which module.
In a future version, MOT 2.0 will capture more
information, such as a user's subscribers, a user's
own subscriptions, user's own ratings, etc. Group
affiliation as shown in Figure 3 is used in scenario
2, where Mary, Jane and Bob eventually belong
to the same group working on a common project,
and in scenario 4, where Mario moves between
two groups, finally reaching one that is better
matched to him.
Figure 4 expresses the adaptive view of the
lesson , which shows other related recommended
materials for further reading based on the similar-
ity of the tags (keywords that label the content).
This is also in view, to some extent, of scenario
1, which requires that adaptation of items and
modules should be supported, and scenario 3,
which requires only recommendation of other
modules. The content is based on an overall social
goal and constraints model, with a hierarchical
structure, directly reflecting, in this simplified
version, a similarly social structured domain
model and social item model underneath. In the

CM ), containing all information (resources and
links between them) of the content, type, place,
etc. about the presentation performed: the set of
all presentation concepts PC C , the set of

⊆

all presentation links PL L, and the set of

all attributes describing presentation PA

⊆

A .
Example: Types of presentation can be as
simple as deciding if a specific content is to be
shown or not, or if the name of a peer student is to
be shown or not. Alternatively, it can be complex,
such as in deciding how the screen is to be used
for the specific presentation, what is to appear
where on the screen, etc.
Definition 36: A presentation concept p

⊆

PC is defined defined by the tuple <P pc , i pc , PA pc ,
PL pc > where P gc

∈

PM is the presentation map the
presentation concept belongs to, i pc is a overlay
concept identifier (item, domain map concept goal
model concept, etc., PA pc

∈

PA is a set of presenta-
tion model concept attributes; and PL pc

∈

PL is a
set of presentation model links the presentation
model concept is participating in.
Example: An overlay over a goal model con-
cept is for instance the Boolean 'show' set to True
for the goal model concept 'Financial crisis' (see
Figure 4). This would mean that a student can
have reading rights to this concept, such as John
in Scenario 3.
Further definitions of link, attribute etc. for
this model follow the Social Goal and Constraints
model example and are not further detailed here.

⊆