Everybody has their own prejudice. The pattern in which women are depicted in history suggests how people may bring bias to their work. Our brains tend to form associations in order to process faster, where some bias is formed within the process. While people are consciously aware of some of their biases, a lot of them are left unnoticed. An easy self-assessment technique is to use the Implicit Association Test (IAT), found by researches interested in implicit social cognition to test the hidden biases. Being aware of our hidden biases is the first step in changing it.
When some historians past judgment on those women in power, they may unconsciously gather and present more negative information than achievements due to their implicit bias toward women. This is called confirmation bias, the tendency for human beings to gather evidence to prove their pre-existing views and ignore contrasting information.
Humans would inevitably have some sort of biases, which is normal and natural. It is critical for us to admit that we have our own biases and consciously adjust it. Furthermore, we should keep the confirmation bias in mind when viewing others’ work and doing our own researches in order to reach objectiveness.