Often, humans display biases, i.e., unconscious tendencies towards a type of decision. Despite decades of study, we have yet to discover why biases are so persistent in all types of decisions. “Biases can help us make better decisions when we use them correctly in an action that has previously given us great reward. However, in other cases, biases can play against us, such as when we repeat actions in situations when it would be better not to,” says Rubén Moreno Bote, coordinator of the UPF Theoretical and Cognitive Neuroscience Laboratory.