A Novel Hybrid Student Model for Personalized Education - Advances in Personalized Web-Based Education - page 71

The operation of F.O.S. leads the system to make inferences about the
changes of the user's state and make useful adaptation decisions, offering
dynamic adaptation to users' needs. With this approach the system identifies
the alterations on the state of student's knowledge level, such as forgetting or
learning are represented. These states determine the progress of the learner each
time. They are revealed by the transition from one stereotype of the student
model to another. Thus, the system has to decide which stereotypes have to be
activated and which stereotypes have to be deactivated, at each interaction of a
learner with educational application.
As Tretiakov et al. (2005) have been stated, a state-chart diagram can been
used to show the sequence of a student's mind. Consequently, the educational
system has to construct statechart diagrams to track the cognitive state transitions

Table 3.1 The relationship between cognitive state and KL stereotype transitions
Cognitive state Stereotype transitions

S/he does not
learn

S/he doesn't read No transition to other KL stereotype

(KL remains the same)

S/he reads but not learn
S/he reads but s/he has difficulty
in understanding

Transition to the next KL stereotype
(KL increases)

S/he learns

S/he forgets Transition to a previous KL stereo-

type (KL decreases)

S/he reaches target knowledge Continuous transition to the

advanced KL stereotypes
(KL increases continuously)

Fig. 3.5 Sequence of the changes of the learner's cognitive state in relation with her/his progress
or no-progress