> Interference theory suggests that forgetting occurs due to two lots of information, coded at different times becoming confused in the LTM, one disrupts recall of another memory.
Proactive interference
> forgetting occurs when past information stored disrupts the recall of new / recent information stored
> memory of an old mobile phone number means you forget your new phone number
Retroactive interference
> forgetting occurs when recent information stored disrupts the recall of past information stored
> memory of a new car registration number means you forget your old one