NASA Goddard Space Flight Center   Feedback is offering and
receiving information in various forms that enables adaptation
and learning, both for individuals and the group as a whole.
Feedback lets us know what's working and what's not, helping us
stay on track for achieving our goals.   The concept of Feedback
comes from the field of cybernetics, where there are two kinds
of feedback:    1. Positive (amplifying, reinforcing) feedback,
which encourages more of the same thing to happen;   2. Negative
(dampening, balancing, self-correcting) feedback, which puts a
limit on something; the classic example is a thermostat that
turns off the heat once the room reaches a certain temperature.
In group dynamics, Feedback is mainly about making the effects
of our actions visible, so we can understand our impact and make
conscious choices. For example, let's say that week after week
in a group, the same few people tend to talk while most of the
group remains silent. Perhaps one week, someone might record how
many times