Copies may be circulated if this statement is included on each copy. I. One concept of the concept is that it is the psychological average of a group of percepts. This may be either a numerical average or an average form , that is, a general image analogous to a composite photograph. Since the objects of a class vary somewhat, every time a new number of the class is encountered the process of perception will involve an assimilation of the new form to the general image. The process of concept formation will involve the accommodating of the general image to each new form.
Percepts involve sensations and memories whereas concepts involve only memories.
This formula goes back further than Piaget, to G. E. M ller, for example. Note that a general image based on many engrams is stronger and more typical than one based on few engrams. The hypothesis of average form has even been applied in the effort to explain form-constancy. But the hypothesis simply will not work in this case, as a little thought will show. Another concept of the concept is that it is innate to some degree instead of being just an average of past phenomenal forms or appearances.