Relational Biases

It’s a family of biases that describes the tendency to behave in a certain way when facing other people or objects.


Tendency to base our decisions on the observations made on the majority, rather than basing it on personal information.


In a group, it’s the tendency to change our decision in order to get the approval of others, in some cases avoiding expressing our own thoughts.

Bandwagon Effect

It’s the tendency to prefer decisions that are more common and popular, rather than less common ones.

Hostile Attribution Bias

It’s the propension to believe that other people act accordingly to a hostile plan directed towards us.

Illusion of Transparency

It’s the tendency to believe that other people can understand our emotional and mental state more than they really can.

Identifiable Victim Effect

It’s the tendency to be kind and help a single, identifiable and precise person in distress, rather than an indistinct group.

Actor/Observer Bias

It’s the tendency to judge in different ways motives and characteristics of certain actions, based on who did them and what kind of relationship we have with them.

IKEA Effect

It’s the tendency to overvalue something we have built or helped building it, both physically and ideally.

Mind Reading Bias

Tendency to think that a person has negative feelings, based on non-verbal communication.

Reactive Devaluation

It’s the propension to negatively evaluate a person that is considered hostile, regardless of the idea presented.

Cheerleader Effect

It’s the propension to consider as more fascinating and interesting people seen in group.

Compassion Fade

It’s a decrease in the level of compassion, if the number of people in need increases.

Emotional Projection

It’s the unconscious tendency to believe that other people share the emotional state, ideas and knowledge of the subject.

Zero-sum Bias

It’s the tendency to erroneously consider some situations as zero-sum games, this leads to believe that other people’s successes correspond to our own failures.

Shared Information Bias

It’s the tendency to waste time in discussions about information already possessed by all members of a group.

Ben Franklin Effect

It’s the tendency to believe that someone who has done a favour once is inclined to do others, and, on the contrary, who owes a favour is inclined not to return it.

Extrinsic Incentive Bias

It’s the tendency to believe that other people work hard because they are motivated by extrinsic incentives (such as money), rather than intrinsic ones (such as satisfaction).