Abnormal Psychology

Abnormal psychology is the field of psychology dedicated to studying deviant behavior. Theorists of abnormal psychology examine abnormal emotion, cognition, and behavior which may be caused by cultural, biological, or environmental sources.

What Is Abnormal?

A significant problem within the field is the definition of abnormal behavior—how do we define what is normal and what is abnormal? Mental health diagnoses have increased over the last several decades, and the behavior required for a mental health diagnosis has been substantially altered over the course of several generations based on cultural, political, and scientific influences. For example, homosexuality was once viewed as a product of mental illness. However, it is now understood as a normal variant of human sexuality.

Approaches to Abnormality

Clinicians have proposed numerous ways of defining abnormal psychology. Statistical normalcy examines the frequency of a behavior within a population. Behavior that occurs at a low frequency, such as social anxiety, is then classified as abnormal. This model has been criticized because it may pathologize behavior that causes no harm to either the client or the people around the client.

Medical models point to distorted brain chemistry, illness, or hormonal imbalances as potential causes of abnormal psychology. For example, schizophrenia seems to have a genetic root, and schizophrenic behavior could be characterized as being caused by abnormal genes. Practitioners of the medical model view abnormal psychology as a manifestation of illness.

More recently, some clinicians have advocated defining abnormal behavior as that which causes both discomfort to the client or those around him or her and that which is not statistically normal. Concepts of normalcy are heavily influenced by culture. A behavior may be abnormal in one culture and cause harm to the individual because of its deviant nature, whereas in another culture, the same behavior might be perfectly acceptable. For example, eating spiders is normal in some cultures, and in western culture, it might be deemed an unhealthy compulsion.

Criticism of Abnormal Psychology

Some theorists argue that the field of abnormal psychology stigmatizes and demonizes historically oppressed populations and people who exhibit behaviors outside of the cultural norm.


  1. Colman, A. M. (2006). Oxford dictionary of psychology. New York, NY: Oxford University Press.
  2. Kring, A. M., Johnson, S. L., Davison, G. C., & Neale, J. M. (2010). Abnormal psychology. Hoboken, NJ: John Wiley & Sons.

Last Updated: 05-10-2018

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  • Wynette

    July 22nd, 2018 at 10:35 PM

    Denial is the condition that occurs when the truth is too alarming to live? See out. Out prior to hitting the wall. Out prior to receiving the blow.

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