Time line :
Social approach
Late 20th century
1960’s onwards
Cognitive approach
20th century onwards
1060’s onward
Learning approach
Late 20th century
1920-60
Psychodynamic approach
20th century
Biological approach
18th-19th century
5. Definitions: * Neurotransmitter: A chemical that is released from a nerve cell which thereby transmits an impulse from a nerve cell to another nerve, muscle, organ, or other tissue. A neurotransmitter is a messenger of neurologic information from one cell to another. * Schizophrenia: A long-term mental disorder of a type involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception, inappropriate actions and feelings, withdrawal from reality and personal relationships into fantasy and delusion, and a sense of mental fragmentation * The Unconscious Mind: that part of the mind wherein psychic activity takes place of which the person is unaware. * Cognition: The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses. * Discrimination: The unjust or prejudicial treatment of different categories of people or things, esp. on the