Reward appears as result of changes in Discomfort level.
Reward = old Discomfort
level Ė new Discomfort level
If Discomfort level was decreased by goalís event impact then reward is positive.
If Discomfort level was increased by goalís event impact then reward is negative.
Reward is distributed over cause
concepts which are responsible for the goal
Related cause-effect relations could be also
Reward isnít affected by fading.
Satisfaction level diagram