What does the phrase "perceived bias" to you? Please let me know. I'm having difficulty understanding the meaning of "perceived" there. Thanks.
PERCIEVED BIAS means BIAS that is PERCEIVED by the reader or listener.

If I make a statement that appears to have some kind of strong in-built emotional, generalised feeling against a group of people, for example, you might PERCEIVE that I have a BIAS in my attitude.
Thank you, Kris.