Blind spot bias is the failure to recognize your own cognitive biases — while readily identifying them in others. It is, in a sense, the meta-bias: the bias about biases.

What Research Shows

In studies by Emily Pronin and colleagues, people consistently rated themselves as less susceptible to cognitive biases than the average person — while rating others as highly susceptible. This is mathematically impossible in aggregate.

Why It's Particularly Dangerous

Every other cognitive bias on this list is at least theoretically fixable through awareness. Blind spot bias attacks the awareness itself. If you believe you are less biased than others, you won't take debiasing strategies seriously.

The Irony

People who score highest on measures of intelligence and analytical thinking often show the strongest blind spot bias — they're better at generating post-hoc rationalizations for their intuitive conclusions.

The Only Real Fix

Assume you are as biased as everyone else. Apply debiasing strategies universally, not selectively. Treat your own confident conclusions with the same skepticism you'd apply to anyone else's.

Reference:

Wikipedia: Bias Blind Spot

https://en.wikipedia.org/wiki/Bias_blind_spot