The most difficult psy­chol­o­gy riddles

The sanguine person is optimistic, buoyant and hopeful. Historically, in the second century A.D., the physician Galen described four temperaments (melancholic, phlegmatic, sanguine and choleric) based upon the four humours or bodily fluids.

Carl Gustav Jung was a Swiss psychiatrist and psychoanalyst who founded analytical psychology. Jung worked as a research scientist at the famous Burghölzli hospital, under Eugen Bleuler. During this time, he came to the attention of the Viennese founder of psychoanalysis, Sigmund Freud. The two men conducted a lengthy correspondence and collaborated, for a while, on a joint vision of human psychology.

Procrastination is the avoidance of doing a task that needs to be accomplished. It could be further stated as a habitual or intentional delay of starting or finishing a task despite its negative consequences. Latin: procrastinare, 'till next day' from "cras", 'tomorrow'

A delusion is a mistaken belief that is held with strong conviction even in the presence of superior evidence to the contrary. As a pathology, it is distinct from a belief based on false or incomplete information, confabulation, dogma, illusion, or some other misleading effects of perception.

Sigmund Freud was an Austrian neurologist and the founder of psychoanalysis.

Stockholm syndrome is named after the bank robbery in Stockholm in 1973. Several bank employees were held hostage in a bank vault for 6 days and became emotionally attached to their captors and even defended them after they were freed. Stockholm Syndrome does not necessarily require a hostage scenario. Essentially, victims mistake a lack of abuse from their oppressors for an act of kindness.

Maslow's hierarchy of needs is a theory in psychology proposed by Abraham Maslow in his 1943 paper "A Theory of Human Motivation" in Psychological Review. ... This means that in order for motivation to occur at the next level, each level must be satisfied within the individual themselves.

Hypersexuality is a clinical diagnosis used by mental healthcare professionals for extremely frequent or suddenly increased libido. Nymphomania was a term previously used for women cases.