What are Concepts? (Part 1)

Amongst my many pet peeves about Intro Psych textbooks is how they handle 'concepts.' It is not so much that they use the term particularly badly, it is that they do not provide any context (i.e., this is a problem even if we put aside the need to redesign Intro Psych more broadly). In particular, I don't see how 'concepts' make any sense without at least some discussion of 'percepts' - the two ideas are intimately intertwined.

Percepts are the things given by perception / taken in the act of perceiving.

Concepts are the things added to perception / things with the taken.

Traditional and Mainstream Contemporary Views
Most of modern psychology grows out of the tradition of "British Empiricism", at least in the sense that most psychologists assumed that perception gives some sort of atomistic units that must be put together and made sense of through some mental process. They assume that percepts - what is gotten from the world - are, as Gibson would somewhat mockingly say, a "scintillation of sensations", an inherently meaningless array of color points, pressure measures, scent elements, etc. Sometimes psychologists more generously start from something like the stationary retinal image, in which case percepts are a disconnected patchwork of colored shapes, sounds, touches, smells, etc.