One thing, KGS is used as a "Tertiary Reinforcer". Something quick for you.
======= the kgs is a tertiary R given *during * a
behavior to signal that a continuation of that behavior will result in a
reinforcement of some kind, either a reward or a cue for a preferred
behavior. The short version is
that it is useful for building duration, or communicating That s right,
keep going . =======
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