Lecture 9 - Closed Loop Applications

Question 1

A closed loop with humans, is a system:

Answer 1

That tries to automatically keep one human variable at a certain level

by measuring the current value of that variable

and continuously adapting the parameter that influences it

Question 2

What are the four components of a closed loop?

Answer 2

1. Human
2. Sensor(s)
3. Influencing algorithm
4. Actuators

Question 3

What is biofeedback. Biofeedback is:

Answer 3

the presentation
of a measurement of a biosignal
to a person

Question 4

Is biofeedback also a closed loop system?

Answer 4

Yes, however it puts the burden of adaptation on the user, since there is no influencing algorithm

Question 5

An affective closed loop system is a system:

Answer 5

that tries to automatically manage an affective state of a human
by measuring a parameter related to this affective state
and continuously adapting another parameter that influences it

Question 6

Most closed loops try to relieve the user by deploying … :

Answer 6

By deploying intelligent influencing algorithm

By deploying well-selected sensors and actuators

Question 7

Law of initial values

Answer 7

The delta measured of skin response is twisted because;

Low levels will probably give positive deltas, and when you start out with a high level, the delta can probably only be negative

Question 8

If the burden of adaptation rests with the user (original biofeedback), then this requires:

Answer 8

The user’s attention
The user’s awareness
And some actions by the user