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Cognitive Approach To Abnormality Essay

4 Approaches to Explaining Abnormality

You must be able to outline and evaluate the:
Biological Approach
Behavioural Approach
Cognitive Approach
Psychodynamic approach

The Biological Approach to explain abnormality

  • The biological approach is also known as the biomedical model.
  • The basic premise is that psychological abnormality has a physical cause such as illness or disease.
  • Behaviour is shaped by internal, physiological factors.  Abnormal behaviours are ‘illnesses’ caused by the possible combination of genetic, biochemical, hormonal and/or neurological factors.   

Evaluation of the Biological Approach

1. One problem with the biological Approach is that the premise lays no blame with the individual. The biological approach suggests that there is a physical cause for abnormality therefore if we diagnose someone as having a mental 'illness' then it is true to say that the individual should receive treatment and support for their illness, but this is not always the case as some people believe that the individual is to blame for their abnormal behaviour (cognitivists).

2. A second criticism to the biological approach is that it relinquishes responsibility from the suffer. When using a medical model the individual is encouraged to be passive in their treatment. This will only treat the symptoms of the abnormality not the psychological cause. 

3. A final weakness is that the biological approach is reductionist. The biological approach tends to break down explanations to the most basic simple level. The biological approach states that psychological abnormality has a physical cause this explanation does not consider the cognitions, learned behaviour or early psychosexual experiences.

McGuffin et al (1996) investigated the genetic component of depression. They found a concordance rate of 46% in MZ twins  and a 20% concordance rate in DZ (fraternal) twins.  
This suggests that there is a genetic component in depression. However it should be recognised that the concordance rate is not 100% in MZ twins, therefore this demonstrates that depression cannot be entirely down to genetics and other factors must be involved. this may be environmental factors such as upbringing,

The Behaviourist Approach to explain abnormality

The behaviourist approach focuses on the ‘behaviour’ of a person in order to explain psychological problems. They claim that abnormal behaviour is learned through experience, and even if something has a physical or biological predisposition, the behaviour is maintained by environmental reinforcement.

3 ways in which behaviourists explain psychological abnormality

Classical conditioning as an explanation of phobias
All behaviour is learned through stimulus-response associations.  
Watson and Rayner (1920) proposed that children learn phobias through paired associations. It is suggested that through classical conditioning people can learn to associate an unconditioned response with a neutral stimulus. Therefore resulting in a conditioned response that can lead to a phobia.
Fear of heights = If a person climbs to the top of a high building (stimulus), looks down and feels nausea and dizziness (response), the association between the two, and the response will cause the phobia.

Operant Conditioning as an explanation of abnormality

Skinner (1974) explains that behaviour is influenced by the consequences of our actions in terms of positive and negative reinforcement. 

Positive reinforcement =  childhood aggression is reinforced then the behaviour is likely to be repeated and may explain how a child learns that aggressive behaviours are appropriate. 
Also, anxiety or depression might receive reward in the form of attention and concern, also making the behaviour be repeated. This positive reinforcement means that the person will repeat that behaviour in the future as they want the positive attention.

Negative reinforcement = maintains a learnt avoidance of a phobia as removal (moving away from the phobia) of the negative emotions  and feelings will reinforce the behaviour. Therefore allowing the individual to learn that avoiding situations will reduce the negative emotions.

Another example is when people suffer with addictions the removal of the withdrawal symptoms by the drug negatively reinforces the abnormal behaviour. 

Social Learning Theory as an explanation of abnormality
Bandura suggests that if we observe behaviour, are able to recall the details, have the ability to replicate it and the opportunity to, then if we are motivated by reinforcements… we will imitate and repeat it. 
Children learn from role models within their lives eg. parents, older siblings and teachers.Antisocial behaviour can be explained by Social Learning Theory, if a child observes an aggressive model who is rewarded. This can lead to imitation therefore the child is likely to imitate antisocial behaviours like aggression. Also some phobias develop due to observing how a model responds to a stimulus. If a child observes a model respond in a negative/maladaptive way to a stimulus then it is likely that the child will also imitate that behaviour as they learn to be frightened of that object.

Evaluation of the Behaviourist Approach as an Explanation of Abnormality

The Cognitive Explanation of Psychological Abnormality

  • Ellis (1962) and Beck (1963) : criticised the behaviourist explanation of abnormality because it focuses on stimulus -> response, but doesn’t take into account the mental processes in between.
  • Cognitive Approach argues that it is the THINKING PROCESSES that occur between a stimulus and response that are responsible for the feelings that form part of the response.
  • The Cognitive Approach suggests that psychological abnormality is caused by faulty cognitions, maladaptive thoughts and behaviours.

Ellis identified that to every event in our lives we hold a belief and that belief leads to a consequence.
It was further identified that distorted beliefs can lead to maladaptive behaviour and in turn psychological abnormality.
Along with EXPLAINING the Irrational Thinking (a-b-c model) from Ellis, you SHOULD also EXPLAIN the Cognitive Triad and Illogical Thinking theory from Beck (1967). 

Beck suggested that negative thoughts underlie mental disorders, but wanted to know why people get depressed? He proposed 2 mechanisms: errors in logic (depressed people form illogical conclusions when they evaluate themselves) and the cognitive triad. 

Evaluation of the Cognitive Approach to Explaining abnormality

The Psychodynamic Approach to Explaining Abnormality

Evaluation of the Psychodynamic Approach as an Explanation of abnormality


I has been suggested that abnormality may be linked to genetics.  In particular strong evidence points to schizophrenia and bipolar depression as having a genetic explanation
It has been demonstrated that first-degree relative of a person suffering schizophrenia have a 10% chance of developing the disorder. This is much greater than the 1% in the normal population.
Family and twin studies have been carried out to assess the importance of genetics in abnormality. the findings however are difficult to interpret as members of a similar family may also share the same environment, therefore it may not be entirely due to biology.


Infection has been found to be related to abnormal behaviour and may explain why people develop abnormalities.
The flu virus has been linked to schizophrenia.
When investigating Schizophrenics it has been found that 14% of cases could be explained by the their mothers health when pregnant. These women appear to have contracted the flu virus during the first trimester of pregnancy and this has led to poor neural development and schizophrenia
Secondly Syphilis is a sexually transmitted disease that has been known to cause brain damage and therefore can be shown to lead to abnormality.


Neurotransmitters are thought to be imbalanced in the nervous system of people suffering from psychological disorders.  Excessive amounts of dopamine have been associated with schizophrenia.

What illness has been associated with low levels of serotonin?
Which hormone is associated with depression?

Brain structure

Abnormal behaviour can occur if the structure of the brain is damaged in some way.
An example is that of enlarged ventricles. Ventricles are sacks of fluid in our brain, people with schizophrenia tend to have larger ventricles than the normal population.
Another example is Alzheimer’s disease, a type of dementia caused by the loss of cells in the nervous system.

Abnormal Psychology

Saul McLeod published 2008, updated 2014

Abnormal psychology is a division of psychology that studies people who are "abnormal" or "atypical" compared to the members of a given society.

There is evidence that some psychological disorders are more common than was previously thought.

Depending on how data are gathered and how diagnoses are made, as many as 27% of some population groups may be suffering from depression at any one time (NIMH, 2001; data for older adults).

The definition of the word abnormal is simple enough but applying this to psychology poses a complex problem: what is normal? Whose norm? For what age? For what culture?

The concept of abnormality is imprecise and difficult to define. Examples of abnormality can take many different forms and involve different features, so that, what at first sight seem quite reasonable definitions, turns out to be quite problematical.

There are several different ways in which it is possible to define ‘abnormal’ as opposed to our ideas of what is ‘normal’.

Statistical Infrequency

Under this definition of abnormality, a person's trait, thinking or behavior is classified as abnormal if it is rare or statistically unusual.  With this definition it is necessary to be clear about how rare a trait or behavior needs to be before we class it as abnormal

For instance one may say that an individual who has an IQ below or above the average level of IQ in society is abnormal. 

However this definition obviously has limitations, it fails to recognize the desirability of the particular behavior. 

Going back to the example, someone who has an IQ level above the normal average wouldn't necessarily be seen as abnormal, rather on the contrary they would be highly regarded for their intelligence.

This definition also implies that the presence of abnormal behavior in people should be rare or statistically unusual, which is not the case.  Instead, any specific abnormal behavior may be unusual, but it is not unusual for people to exhibit some form of prolonged abnormal behavior at some point in their lives.

Strength: The statistical approach helps to address what is meant by normal in a statistical context. It helps us make cut – off points in terms of diagnosis.

Limitations: However, this definition fails to distinguish between desirable and undesirable behavior. For example, obesity is a statistically normal but not associated with healthy or desirable. Conversely high IQ is statistically abnormal, but may well be regarded as highly desirable.

Many rare behaviors or characteristics (e.g. left handedness) have no bearing on normality or abnormality.  Some characteristics are regarded as abnormal even though they are quite frequent.  Depression may affect 27% of elderly people (NIMH, 2001).  This would make it common but that does not mean it isn’t a problem

The decision of where to start the "abnormal" classification is arbitrary. Who decides what is statistically rare and how do they decide? For example, if an IQ of 70 is the cut-off point, how can we justify saying someone with 69 is abnormal, and someone with 70 normal ?

Violation of Social Norms

Every culture has certain standards for acceptable behavior, or socially acceptable norms. Norms are expected ways of behaving in a society according to the majority and those members of a society who do not think and behave like everyone else break these norms so are often defined as abnormal.

Under this definition, a person's thinking or behavior is classified as abnormal if it violates the (unwritten) rules about what is expected or acceptable behavior in a particular social group. Their behavior may be incomprehensible to others or make others feel threatened or uncomfortable.

Social behavior varies markedly when different cultures are compared. For example, it is common in Southern Europe to stand much closer to strangers than in the UK.  Voice pitch and volume, touching, direction of gaze and acceptable subjects for discussion have all been found to vary between cultures.

With this definition, it is necessary to consider: (i) The degree to which a norm is violated, the importance of that norm and the value attached by the social group to different sorts of violation. (ii) E.g. is the violation rude, eccentric, abnormal or criminal?

Limitations: The most obvious problem with defining abnormality using social norms is that there is no universal agreement over social norms. Social norms are culturally specific - they can differ significantly from one generation to the next and between different ethnic, regional and socio-economic groups. In some societies, such as the Zulu for example, hallucinations and screaming in the street are regarded as normal behavior.

Social norms also exist within a time frame, and therefore change over time.  Behavior that was once seen as abnormal may, given time, become acceptable and vice versa.  For example drink driving was once considered acceptable but is now seen as socially unacceptable whereas homosexuality has gone the other way.  Until 1980 homosexuality was considered a psychological disorder by the World Health Organization (WHO) but today is considered acceptable.

Social norms can also depend on the situation or context we find ourselves in. Is it normal to eat parts of a dead body? In 1972 a rugby team who survived a plane crash in the snow-capped Andes of South America found themselves without food and in sub-freezing temperatures for 72 days. In order to survive they ate the bodies of those who had died in the crash.

Failure to Function Adequately

Under this definition, a person is considered abnormal if they are unable to cope with the demands of everyday life.  They may be unable to perform the behaviors necessary for day-to-day living e.g. self-care, hold down a job, interact meaningfully with others, make themselves understood etc.

Rosenhan & Seligman (1989) suggest the following characteristics that define failure to function adequately:

    o Suffering

    o Maladaptiveness (danger to self)

    o Vividness & unconventionality (stands out)

    o Unpredictably & loss of control

    o Irrationality/incomprehensibility

    o Causes observer discomfort

    o Violates moral/social standards

One limitation of this definition is that apparently abnormal behavior may actually be helpful, function and adaptive for the individual.  For example, a person who has the obsessive-compulsive disorder of hand-washing may find that the behavior makes him cheerful, happy and better able to cope with his day.

Many people engage in behavior that is maladaptive/harmful or threatening to self, but we don’t class them as abnormal

 Adrenaline sports

 Smoking, drinking alcohol

 Skipping classes

Deviation from Ideal Mental Health

Under this definition, rather than defining what is abnormal, we define what is normal/ideal and anything that deviates from this is regarded as abnormal.  This requires us to decide on the characteristics we consider necessary to mental health.

Jahoda (1958) defined six criteria by which mental health could be measured:

    o Positive view of the self

    o Capability for growth and development

    o Autonomy and independence

    o Accurate perception of reality

    o Positive friendships and relationships

    o Environmental mastery – able to meet the varying demands of day-to-day situations

According to this approach, the more of these criteria are satisfied, the healthier the individual is.

Limitation: It is practically impossible for any individual to achieve all of the ideal characteristics all of the time.  For example, a person might not be the ‘master of his environment’ but be happy with his situation.  The absence of this criterion of ideal mental health hardly indicates he is suffering from a mental disorder.

Ethnocentric: Most definitions of psychological abnormality are devised by white, middle class men. It has been suggested that this may lead to disproportionate numbers of people from certain groups being diagnosed as "abnormal." 

For example, in the UK, depression is more commonly identified in women, and black people are more likely than their white counterparts to be diagnosed with schizophrenia. Similarly, working class people are more likely to be diagnosed with a mental illness than those from non manual backgrounds.

Perspectives in Abnormal Psychology


Behaviorists believe that our actions are determined largely by the experiences we have in life, rather than by underlying pathology of unconscious forces. Abnormality is therefore seen as the development of behavior patterns that are considered maladaptive (i.e. harmful) for the individual.

Behaviorism states that all behavior (including abnormal) is learned from the environment (nurture), and that all behavior that has been learnt can also be ‘unlearnt’ (which is how abnormal behavior is treated).

The emphasis of the behavioral approach is on the environment and how abnormal behavior is acquired, through classical conditioning, operant conditioning and social learning.

Classical conditioning has been said to account for the development of phobias. The feared object (e.g. spider or rat) is associated with a fear or anxiety sometime in the past. The conditioned stimulus subsequently evokes a powerful fear response characterized by avoidance of the feared object and the emotion of fear whenever the object is encountered.

Learning environments can reinforce (re: operant conditioning) problematic behaviors. E.g. an individual may be rewarded for being having panic attacks by receiving attention from family and friends – this would lead to the behavior being reinforced and increasing in later life.

Our society can also provide deviant maladaptive models that children identify with and imitate (re: social learning theory).


The cognitive approach assumes that a person’s thoughts are responsible for their behavior. The model deals with how information is processed in the brain and the impact of this on behavior.

The basic assumptions are:

  • Maladaptive behavior is caused by faulty and irrational cognitions.

  • It is the way you think about a problem, rather than the problem itself that causes mental disorders.

  • Individuals can overcome mental disorders by learning to use more appropriate cognitions.

The individual is an active processor of information. How a person, perceives, anticipates and evaluates events rather than the events themselves, which will have an impact on behavior. This is generally believed to be an automatic process, in other words we do not really think about it.

In people with psychological problems these thought processes tend to be negative and the cognitions (i.e. attributions, cognitive errors) made will be inaccurate:

These cognitions cause distortions in the way we see things; Ellis suggested it is through irrational thinking, while Beck proposed the cognitive triad.

Medical / Biological

The medical model of psychopathology believes that disorders have an organic or physical cause. The focus of this approach is on genetics, neurotransmitters, neurophysiology, neuroanatomy, biochemistry etc.

For example, in terms of biochemistry – the dopamine hypothesis argues that elevated levels of dopamine are related to symptoms of schizophrenia.

The approach argues that mental disorders are related to the physical structure and functioning of the brain.

For example, differences in brain structure (abnormalities in the frontal and pre-frontal cortex, enlarged ventricles) have been identified in people with schizophrenia.


The main assumptions include Freud’s belief that abnormality came from the psychological causes rather than the physical causes, that unresolved conflicts between the id, ego and superego can all contribute to abnormality, for example:

  • Weak ego: Well- adjusted people have a strong ego that is able to cope with the demands of both the id and the superego by allowing each to express itself at appropriate times. If, however, the ego is weakened, then either the id or the superego, whichever is stronger, may dominate the personality.
  • Unchecked id impulses: If id impulses are unchecked they may be expressed in self-destructive and immoral behavior. This may lead to disorders such as conduct disorders in childhood and psychopathic [dangerously abnormal] behavior in adulthood.
  • Too powerful superego: A superego that is too powerful, and therefore too harsh and inflexible in its moral values, will restrict the id to such an extent that the person will be deprived of even socially acceptable pleasures. According to Freud this would create neurosis, which could be expressed in the symptoms of anxiety disorders, such as phobias and obsessions.

Freud also believed that early childhood experiences and unconscious motivation were responsible for disorders.

An Alternative View: Mental illness is a Social Construction

Since the 1960’s it has been argued by anti-psychiatrists that the entire notion of abnormality or mental disorder is merely a social construction used by society. Notable anti-psychiatrists were Michel Foucault, R.D. Laing, Thomas Szasz and Franco Basaglia. Some observations made are;

  • Mental illness is a social construct created by doctors. An illness must be an objectively demonstrable biological pathology, but psychiatric disorders are not.
  • The criteria for mental illness is vague, subjective and open to misinterpretation criteria.
  • The medical profession uses various labels eg. depressed, schizophrenic to exclude those whose behavior fails to conform to society’s norms.
  • Labels and consequently treatment can be used as a form of social control and represent an abuse of power.
  • Diagnosis raises issues of medical and ethical integrity because of financial and professional links with pharmaceutical companies and insurance companies.


Jahoda, M. (1958). Current concepts of positive mental health.

National Institute of Mental Health. (2001). Depression research at the National Institute of Mental Health. Retrieved from http://www.nimh.nih.gov/health/publications/depression/complete-index.shtml.

Rosenhan, D. L., & Seligman, M. E. P. (1989). Abnormal Psychology Second Edition. New York: W.W. Norton.

How to reference this article:

McLeod, S. A. (2014). Abnormal psychology. Retrieved www.simplypsychology.org/abnormal-psychology.html

Audio Broadcasts

Listen to a MIT undergraduate lecture on Defining Mental Illness.

Listen to a MIT undergraduate lecture on Causing Mental Illness.

BBC Radio 4 Broadcast on why some people have schizophrenia and others don't.

BBC Radio 4 Broadcast on David Rosenhan's Pseudo-Patient Study.

PDF Downloads

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DSM-IV Classification of Mental Disorders

Culture and Abnormality

Abnormal Psychology Models Summary

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PowerPoint Downloads

Abnormal Psychology Introduction

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