Recent Memories Make a Bigger Impression Than Old Flames

Our brain remembers the most recent information better because our short-term memory can only hold a limited amount of information. The older information gets replaced by the recent one, leaving the most recent one in the memory.

Recency effect weighs heavier than primacy effect when you need to decide on a series of impressions that happened long time ago.

This also makes us overestimate the importance of the information that is easily available mentally, even if it is not necessarily the most relevant ones.