Page "Learning curve" Paragraph 4

Initially introduced in educational and behavioral psychology, the term has acquired a broader interpretation over time, and expressions such as " experience curve ", " improvement curve ", " cost improvement curve ", " progress curve ", " progress function ", " startup curve ", and " efficiency curve " are often used interchangeably.

In economics the subject is rates of " development ", as development refers to a whole system learning process with varying rates of progression.

Generally speaking all learning displays incremental change over time, but describes an " S " curve which has different appearances depending on the time scale of observation.

It has now also become associated with the evolutionary theory of punctuated equilibrium and other kinds of revolutionary change in complex systems generally, relating to innovation, organizational behavior and the management of group learning, among other fields.

These processes of rapidly emerging new form appear to take place by complex learning within the systems themselves, which when observable, display curves of changing rates that accelerate and decelerate.