Are generalized synchronization and noise--induced synchronization   identical types of synchronous behavior of chaotic oscillators?
  This paper deals with two types of synchronous behavior of chaotic oscillators -- generalized synchronization and noise--induced synchronization. It has been shown that both these types of synchronization are caused by similar mechanisms and should be considered as the same type of the chaotic oscillator behavior. The mechanisms resulting in the generalized synchronization are mostly similar to ones taking place in the case of the noise-induced synchronization with biased noise. 
A.E. Hramov, A.A. Koronovskii, O.I. Moskalenko