p016fig01.10 The blocking paradigm shows how sensory cues that are conditioned to predict specific consequences can attentionally block other cues that do not change those predictions.  On the other hand, if the total cue context is changed by adding a cue that does not change the predicted consequences, then the new cues can be conditioned to the direction of that change. They can hereby learn, for example, to predict fear if the shock level unexpectedly increases, or relief if the shock level unexpectedly decreases.<BR>||  Minimal adaptive prediction. blocking- CS2 is irrelevant, unblocking- CS2 predicts US change.  Learn if CS2 predicts a different (novel) outcome than CS1.  CS2 is not redundant.