Unit V. Abnormal Behaviour and Mental Illness

Course

Course-XI (1.4.11) (Optional) — Guidance and Counselling

Meaning and Concept of Normality and Abnormality

Normality and abnormality are not simple, black-and-white categories. Instead, they exist on a spectrum. Psychologists and scholars often disagree on where exactly to draw the line between normal and abnormal behavior, so they use a combination of different perspectives to define it.

The statistical perspective suggests that behavior is abnormal if it is mathematically rare (though this is flawed, as extreme intelligence is rare but not a mental illness). The social norm perspective defines abnormality as behavior that drastically violates cultural rules. Finally, the functional impairment perspective—which is the most widely accepted in psychology—defines abnormality as behavior that causes severe personal distress or prevents a person from performing daily tasks, maintaining relationships, or living safely.

Example

If a Class 6 student insists on wearing winter gloves in the summer, they might just be violating a social norm (acting uniquely). However, if they have an intense, paralyzing fear of touching their desk that prevents them from writing or participating in class, this is a functional impairment and leans toward abnormal behavior.

Why this matters for a teacher: Teachers must realize that just because a student acts differently or uniquely (breaking a social norm) doesn't automatically mean they have a mental illness (functional abnormality).

Causal Factors of Abnormal Behaviour: Biological and Psychological

Mental illness is rarely caused by just one thing. It is usually a complex mix of biological and psychological factors.

Biological Factors These are physical issues within the body and brain that lead to abnormal behavior. Key biological factors include:

• Genetics: Inheriting a vulnerability to certain mental illnesses from parents.
• Neurochemical imbalances: An oversupply or undersupply of neurotransmitters (chemical messengers in the brain), like serotonin or dopamine.
• Brain dysfunction or injury: Physical damage to the brain from accidents, infections, or prenatal complications.

Example

A student with a strong family history of severe mood swings might have a genetic vulnerability, making them biologically more susceptible to developing depression during the stressful teenage years.

Psychological Factors These relate to the mind, life experiences, and how a person processes the world. Key psychological factors include:

• Early childhood trauma: Experiences of severe neglect, abuse, or loss during early developmental years.
• Chronic stress: Prolonged exposure to hostile environments, such as severe poverty or intense domestic conflict.
• Maladaptive learning: Learning unhealthy coping mechanisms or deep-seated fears by watching parents or caregivers react negatively to the world.

Example

A student who witnessed severe domestic violence at home (childhood trauma) might develop extreme, disruptive anxiety in the classroom, driven entirely by psychological stress rather than a genetic brain issue.

Why this matters for a teacher: Understanding these causes helps teachers view abnormal behavior not as a "bad choice" made by a disobedient student, but as a complex result of biology and life history requiring professional empathy and support.

Classification of Mental Illness (DSM-IV)

To properly study and treat mental illnesses, professionals need a shared language to organize them. The official syllabus for this course references the DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition). (Note: In modern clinical practice, the DSM-IV has since been superseded by the updated DSM-5 and DSM-5-TR, though the foundational categories remain similar).

The DSM-IV organized mental illnesses into broad categories based on shared behavioral and psychological symptoms. For a teacher's general awareness, some of the major broad groupings include:

• Disorders Usually First Diagnosed in Infancy, Childhood, or Adolescence: Conditions that appear early in life, such as Learning Disorders, Autism, and Attention-Deficit/Hyperactivity Disorder (ADHD).
• Anxiety Disorders: Conditions characterized by overwhelming, irrational fear and worry, such as Phobias and Obsessive-Compulsive Disorder (OCD).
• Mood Disorders: Severe disturbances in emotion, such as Major Depressive Disorder and Bipolar Disorder.
• Schizophrenia and Other Psychotic Disorders: Severe conditions where a person loses touch with reality, experiencing hallucinations or deep delusions.
• Eating Disorders: Severe disturbances in eating behavior, such as Anorexia or Bulimia.

Example

If a school psychologist informs a teacher that a student has been diagnosed with ADHD, the teacher understands from the classification system that this falls under early childhood developmental disorders, indicating a recognized medical condition that requires a modified teaching approach.

Why this matters for a teacher: Being familiar with these broad categories allows teachers to understand the basic terminology used by school psychologists and medical professionals in a student's file, without needing to be diagnostic experts themselves.

Key Terms

• Normality — Behavior that allows a person to function safely, adapt to their environment, and meet the daily demands of life.
• Abnormality — Behavior that is atypical, causes significant personal distress, and severely impairs a person's ability to function normally.
• Neurotransmitter — Chemical messengers in the brain that, when unbalanced, can act as a biological cause for mental illness.
• DSM — The Diagnostic and Statistical Manual of Mental Disorders, a standard guidebook used globally by professionals to classify mental illnesses.

Quick Recap

• Normality and abnormality exist on a spectrum and are judged by statistical frequency, cultural norms, and most importantly, functional impairment.
• Biological causes of abnormal behavior include genetics, brain injury, and chemical imbalances in the brain.
• Psychological causes of abnormal behavior include childhood trauma, severe stress, and unhealthy learned behaviors.
• The DSM-IV (now updated to DSM-5) classifies mental illnesses into broad categories like mood, anxiety, and childhood developmental disorders to help professionals communicate clearly.

Further Reading

• Abnormal Psychology by James N. Butcher, Susan Mineka, and Jill M. Hooley
• Advanced Educational Psychology by S.K. Mangal
• Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR) by the American Psychiatric Association