Cognitive Bias Explorer

Primacy effect

Memory effect

The first items in a list or sequence are remembered better than those in the middle, partly because they get more attention and mental rehearsal. Early information can also shape how we judge what follows.

In everyday life

After a waiter recites eight specials, the first two are the only ones you can still name when ordering.

After a long day of job interviews, the hiring panel can describe the opening candidate in detail, while everyone who came after, including the final one, blurs together.

Why your mind does this

We cannot hold every moment of an experience or every item in a list in mind. The brain keeps a few standout pieces, such as the most intense moment, the ending, or the first and last items, and lets them stand for the whole. This makes memories compact and quick to use.

Its family, in 30 seconds: Key elements

How to spot it

Ask whether you favor an option mainly because it was the first one you saw or heard.

What you can do

When comparing several options, go through them again in a different order before deciding.

Same family: Key elements

SourcesRundus (1971)Wikipedia

Cognitive Bias Explorer

Memory effect · Key elements

Primacy effect

The first items in a list or sequence are remembered better than those in the middle, partly because they get more attention and mental rehearsal. Early information can also shape how we judge what follows.