Information Technology Reference
In-Depth Information
γ
=
Λ
(
MS,B
)
=
{
(
buy
_
local
_
fruits,
0
.
075)
,
(
buy
_
sports
_
car,
0
.
29)
}
.
The motivational structure, whose creation is explained in this section, changes if the
motive state is adjusted. The following section elaborates the computation of the motive
state adjustment.
5
Taking Reliability into Account
Agents usually behave differently in reliable vs. unreliable situations. Reliability makes
the agent feel safe, whereas unreliability may signalize harassment, even danger. The
degree of reliability of the current situation has direct impact on the motivational struc-
ture of the agent in our approach. As said before for every desire
D
we assume that
the beliefs
B
of the agent is able to derive whether the desire is reliably achievable
B
|
=
reliable
(
D
)
. This means that the agent has the means (in form of plans and ac-
tions) to achieve the desire
D
in the current situation, cf. [4]. The belief on the reliability
of all desires enables the agent to assess the reliability of the whole situation and gives
an idea whether more basic motives, respectively desires, should be pursued instead of
more higher motives, respectively desires. For example, if the agent is situated in some
resource-bound location, say a desert, then usually a very small portion of the agent's
desires is reliably achievable. In unreliable environments the agent should stick to de-
sires that derive from more low-level motives, i. e. from motives that are in deficiency
levels.
Definition 10.
Let
m
be a motive and let
K
=
{
(
m, D
1
,cs
1
,φ
1
)
,...,
(
m, D
l
,cs
l
,φ
l
)
}
be the set of motive couplings for
m
with
cs
i
>
0
for
i
=1
,...,l
.Then
m
is called
satisfiable
wrt. beliefs
B
, denoted by
B
|
=
sat
(
m
)
, if there exists an
k
∈{
1
,...,l
}
desire
D
with
l
cs
k
≥
l
cs
i
and
B
|
=
reliable
(
D
)
.
i
=1
The above definition says that a motive
m
is satisfiable if there is a desire
D
that is
coupled to
m
above average and that is reliable. Given the information on satisfiability
of motives in a given situation the agent has to compare its set of motives with the set of
motives that are satisfiable. In general, the more motives of an agent are satisfiable the
more reliable the current situation is. In this comparison one has to consider the different
motive levels as especially the deficiency motives have more weight in assessing the
situation as reliable. Therefore, for a motive state
M
and beliefs
B
the reliability of the current situation with respect to the reliability of desires and hence
the satisfiability of motives, denoted by
=(
M
,MC,wr,w
)
rel
_
sit
, is assessed by
l
L
+
u
L
|
ST
L
|
|
rel
_
sit
=
Z
·
(1)
2
S
L
|
L∈L
with (remember that
L(
m
)
∈L
denotes the motive level of
m
)
