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The function
μ
computes the motivation value for the desire
D
. For adjusting the
motivational structure
γ
of the agent we compute the motivational value for each desire
for which exists at least one active motive coupling.
Definition 9.
For a motive state
MS
(
D
)
=(
M
,MC,wr,w
)
and a belief state
B
we set
Λ
(
MS,B
)=
{
(
d, μ
(
d
))
|∃
mc
∈
MC
:
d
=
D
(
mc
)
,
B
|
=
d, B
|
=
φ
(
mc
)
}
The motivation structure
γ
contains the set of desires that are not satisfied and for whose
there exists at least one active motive coupling, i. e., the condition of the coupling is
satisfied together with their respective current motivational value.
Example 6.
We continue Example 3 and instantiate the level weights according to the
ranges given in Example 2 assuming a very reliable situation of the agent.
w
(
sa
)=0
.
25
∈
wr
(
sa
)
,
w
(
pn
)=0
.
75
∈
wr
(
pn
)
,
w
(
es
)=0
.
45
∈
wr
(
es
)
For the motive couplings we formalize those of Example 3 and add the motive “
pres-
tige
” with a positive coupling for “
buy a sports car
”.
(
env
_
awareness, save
_
whales,
0
.
9
,endangered
_
whales
)
,
(
env
_
awareness, buy
_
local
_
fruits,
0
.
3
,true
)
,
(
evn
_
awareness, buy
_
sports
_
car,
−
0
.
9
,true
)
,
(
prestige, buy
_
sports
_
car,
1
,true
)
The beliefs of the agent shall be given by
B
. Given the motive state described
above we can compute the corresponding motivational structure as follows. The desire
“
save
_
whales
” is contained in a motive coupling but as the agent is ignorant it does
not believe that whales are endangered and consequently does not have a motivation
for saving the whales. The desire “
buy
_
local
_
fruits
” has a motive coupling with level
weight
=
∅
0
.
25
and coupling strength
0
.
3
. The resulting basic motivation is
β
(0
.
25
,
0
.
3) =
0
. As there are no other motive couplings for the desire the motivation value is
equal to the basic motivation. The desire “
buy
_
sports
_
car
” has two motive couplings
from different motives, one positive coupling and one negative. The resulting basic
motivations are
β
.
075
(0
.
25
,
−
0
.
9) =
−
0
.
225
and
β
(0
.
45
,
1) = 0
.
45
. From these we get the
motivation value:
45) =
−
0
.
225 + 0
.
45
μ
(
buy
_
sports
_
car
)=
f
(
−
0
.
225
,
0
.
1
−
0
.
225
=
0
.
225
775
≈
0
.
29
0
.
Thus, the resulting motivation value for “
buy
_
sports
_
car
” is positive such that the
motive coupling from the motive “
prestige
” is dominating the coupling from “
environ-
mental awareness
”, as expected. The resulting motivational structure of the agent is
given by
