From the site Listverse.com:

brain“The human mind is a wonderful thing. Cognition, the act or process of thinking, enables us to process vast amounts of information quickly. For example, every time your eyes are open, you brain is constantly being bombarded with stimuli. You may be consciously thinking about one specific thing, but you brain is processing thousands of subconscious ideas.

Unfortunately, our cognition is not perfect, and there are certain judgment errors that we are prone to making, known in the field of psychology as cognitive biases. They happen to everybody regardless of age, gender, education, intelligence, or other factors. Some of them are well known, others not, but all of them are interesting.”

They are:

Gambler’s Fallacy:
The tendency to think that future probabilities are altered by past events, when in reality, they are not.

Reactivity:
The tendency of people to act or appear differently when they know that they are being observed.

Pareidolia:
When random images or sounds are perceived as significant.

Self-fufilling prophecy:
Engaging in behaviors that obtain results that confirm existing attitudes.

Halo Effect:
The tendency for an individual’s positive or negative trait to “spill over” to other areas of their personality in others’ perceptions of them.

Herd Mentality:
The tendency to adopt the opinions and follow the behaviors of the majority to feel safer and to avoid conflict.

Reactance:
The urge to do the opposite of what someone wants you to do out of a need to resist a perceived attempt to constrain your freedom of choice.

Hyperbolic discounting:
The tendency for people to prefer a smaller, immediate payoff over a larger, delayed payoff.

Escalation of commitment:
The tendency for people to continue to support previously unsuccessful endeavors.

The Placebo effect:
When an ineffectual substance that is believed to have healing properties produces the desired effect.

Read more about it here:  Top 10 Common Faults In Human Thought