TABLE 1.

The concepts co-adaptation, co-learning and co-evolution defined in terms of timespan in which they occur, persistence and intention.

	Co-adaptation	Co-learning	Co-evolution
Timespan	Short (seconds—hours)	Medium (hours—weeks)	Long (weeks—years)
Persistence	Developed behavior/mental state does not necessarily persist over time, and probably not at all across contexts	Developed behavior/mental state persists over time and possibly across contexts	Developed behavior/mental state might persist for a while but possibly continues to evolve, similar to the development of habituation
Intention	Changes and developments happen as a consequence of interactions and an implicit or explicit drive to improve performance or experience	Explicitly goal-driven: Attempts to improve performance or experience; learning is an explicit goal	Changes and developments happen as a consequence of interactions and possibly an implicit drive to improve performance or experience