General objective of this lecture is to present on Symptoms of Schizophrenia. Profound disruption in cognition and emotion, affecting the most fundamental human attributes: Language, Thought, Perception, Affect and Sense of self. The symptoms of schizophrenia are usually classified into one of two categories – positive or negative. Positive symptoms – represent a change in behaviour or thoughts, such as hallucinations or delusions; negative symptoms – represent a withdrawal or lack of function that you would usually expect to see in a healthy person.