1. strength of US is greater then expectation, all CS's will receive excitatory conditioning
2. the strength of US is less then expectation, CS paired will receive inhibitory conditioning
3. strength is equal, no conditioning
4. the larger the difference between the expectation and the US the more conditioning
5. more salient CS condition faster
6. if two or more CS presented together, subjects expectation will = total strength (excitatory and inhibitory cancel each other out)