Psychological Disorders: Key Concepts and Classifications

Psychological Disorders

This section provides an overview of major psychological disorders, focusing on their definitions, symptoms, and distinguishing features. Understanding these disorders is essential for recognizing abnormal behavior and the impact of mental health on individuals and society.

Depressive Disorders and Bipolar Disorders

• Major Depressive Disorder (MDD): A mood disorder characterized by persistent feelings of sadness, hopelessness, and loss of interest or pleasure in most activities. Symptoms must last at least two weeks and cause significant impairment in daily functioning.

• Bipolar Disorder: A mood disorder involving alternating periods of depression and mania. Bipolar I involves full manic episodes, while Bipolar II involves hypomanic episodes and major depression.

• Mania: A state of abnormally elevated mood, energy, and activity levels. Symptoms include inflated self-esteem, decreased need for sleep, rapid speech, and impulsive behavior.

• Example: An individual with bipolar disorder may experience weeks of deep depression followed by a period of excessive energy, little sleep, and risky decision-making.

Schizophrenia

Schizophrenia is a severe psychological disorder characterized by disorganized thinking, disturbed perceptions, and inappropriate emotions and actions.

• Symptoms of Schizophrenia:

  • Disturbed Perceptions and Beliefs: Includes hallucinations (false sensory experiences, such as hearing voices) and delusions (false beliefs, often of persecution or grandeur).

  • Thought Derailment (Poor Selective Attention): Difficulty focusing on one thought, leading to fragmented thinking.

  • Disorganized Speech: Speech may be incoherent or illogical, sometimes described as "word salad."

  • Diminished and Inappropriate Emotions: Includes flat affect (lack of emotional expression), impaired theory of mind (difficulty understanding others' emotions), and inappropriate motor behavior (such as catatonia, a state of immobility or excessive movement).

• Example: A person with schizophrenia may believe they are being watched (delusion), hear voices others cannot hear (hallucination), and speak in a way that is difficult to understand (word salad).

Dissociative, Personality, and Eating Disorders

Dissociative Disorders

• Dissociative Identity Disorder (DID): Formerly known as multiple personality disorder, DID involves the presence of two or more distinct identities or personality states that control an individual's behavior at different times.

• Example: An individual with DID may have different memories, behaviors, and even voices associated with each identity.

Personality Disorders

• Antisocial Personality Disorder: Characterized by a long-term pattern of disregard for, or violation of, the rights of others. Individuals may be deceitful, impulsive, and lack remorse for their actions.

• Example: A person with antisocial personality disorder may repeatedly break the law or manipulate others for personal gain without feeling guilt.

Eating Disorders

• Anorexia Nervosa: An eating disorder marked by an intense fear of gaining weight, leading to severe restriction of food intake and dangerously low body weight.

• Bulimia Nervosa: Characterized by cycles of binge eating followed by compensatory behaviors such as vomiting, fasting, or excessive exercise.

• Binge-Eating Disorder: Involves recurrent episodes of eating large quantities of food, often rapidly and to the point of discomfort, without regular compensatory behaviors.

• Understanding Eating Disorders: These disorders are influenced by a combination of genetic, psychological, and sociocultural factors.

• Example: A person with bulimia nervosa may eat large amounts of food in a short period and then induce vomiting to prevent weight gain.

Neurodevelopmental Disorders

• Autism Spectrum Disorder (ASD): A developmental disorder characterized by difficulties in social interaction, communication, and restricted or repetitive patterns of behavior. Symptoms typically appear in early childhood.

• Attention-Deficit/Hyperactivity Disorder (ADHD): A neurodevelopmental disorder marked by patterns of inattention, hyperactivity, and impulsivity that interfere with functioning or development.

• Example: A child with ADHD may have trouble focusing on tasks, act impulsively, and be overly active compared to peers.

Additional info: These notes expand upon the provided headings by including definitions, examples, and context for each disorder, ensuring a comprehensive overview suitable for exam preparation.