Survivorship bias is defined as the logical and
reasonable error of concentrating on the people or
things that made it past some selection
process and overlooking those that did
not, typically because of their lack of visibility.
Examples:
- Suppose you join a gym and attend it for a few days straight.
So, you see the same people who came regularly, and are fit and
motivated. So, after a few days you may get a little disappointed
as to why you aren't able to stick to your schedule and stay
motivated for more than a week, when most people who you saw at the
gym could. What you may not notice are the many people who had
previously enrolled for gym membership and had stopped turning up
for gym just after a week.
- Quite often, we experience surreal amazement from photographers
for getting such "perfectly timed photographs" or even by your
photogenic friend who always get such perfect photos. What we don't
realize is that these clicks are those that were carefully and
naturally selected from 100's (if not 1000's of clicks through
trial and error).
- Sometimes when you hear a new song release, you might think:
"Music these days are so horrible. They don't make music like they
used to...like in those old days". We compare a new song with the
best songs from the previous years and decades, which were
themselves so good that they survived the test of time against all
competitions and selection process. This is a classic example of
Survivorship bias.