Types of bias
Explicit bias - The attitudes or beliefs we have about a person or group on a conscious level.
Implicit bias - An inability to be neutral in our thinking and feeling, categorized by having a preference for, or aversion to, a person or group of people. Not only are we unaware of these feelings, these biases are also incorrect.
In-Group bias - The tendency for people to give preferential treatment to others who belong to the same group that they do.
Confirmation bias - The tendency to search for, interpret, favor, and recall information in a way that confirms or supports one's prior beliefs or values.
Other forms of bias
Selection bias - A selected group limits the diversity of opinions or experiences shared. (For example, you want to know how employees feel about a particular idea, initiative, or policy, but you only ask managers for their input. This provides an incomplete and incorrect picture of the situation.)
Actor/Observer bias - Our tendency to judge our own behavior as the result of external factors out of our control, while judging others’ behavior as the result of their innate personality. (This can lead to making excuses for ourselves while judging others.)
Dunning-Kruger Effect - Tendency to overestimate our cognitive abilities when considering a new or unfamiliar idea or topic. For example, we don't understand the depth of what we don't know. This limits our potential to understand an idea fully when we are speaking to people who may have more expertise than us.
Availability bias - Tendency to use the first thing that comes to mind to make a judgment about something.
Anchoring bias - The tendency to give the most weight to the first thing we learn about someone or something. We tend to use this as a reference point for all further information learned; it can even persist once we learn contradictory information.
Negativity bias - Where adverse or negative experiences in our lives have a greater impact on our psychological state than positive ones. For example, negative memories have more sticking power in our minds than positive ones.