Answer:
retroactive; proactive
Explanation:
Retroactive interference: In psychology, the term retroactive interference is defined as a phenomenon that describes the difficulty in remembering old information as the new information gets in the way or hinder the tendency of a person to recall older information.
Proactive interference: In psychology, the term proactive information is defined as a phenomenon that describes the tendency of an individual while memorizing a piece of particular information including formulas, names, or ideas to forget the earlier information being presented at first because of remembering the later part.