Retroactive interference

• Retroactive interference occurs when learning NEW affects the recall of old information already stored in LTM. ​
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  In the experiment, the NEW information (the SECOND set of shapes) should have affected you remembering the old information (the FIRST set of shapes). ​

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• An everyday example of retroactive interference is when you get a new mobile number and after a while you can’t remember your old mobile number, even when you had it for many years. ​
• This usually occurs when the new information is similar to the old information.​