source: https://en.wikipedia.org/wiki/Psychological_torture
>definitions
-- torture
Torture is any act by which severe pain or suffering, whether physical or mental, is intentionally inflicted on a person for such purposes as obtaining from him or a third person information or a confession, punishing him for an act he or a third person has committed or is suspected of having committed, or intimidating or coercing him or a third person, or for any reason based on discrimination of any kind, when such pain or suffering is inflicted by or at the instigation of or with the consent or acquiescence of a public official or other person acting in an official capacity. (UN Convetion againt Torture, 1984, 1987)
-- psychological torture
Psychological torture or mental torture is a type of torture that relies primarily on psychological effects, and only secondarily on any physical harm inflicted.
A contemporary definition of psychological torture are those processes that "involve attacking or manipulating the inputs and processes of the conscious mind that allow the person to stay oriented in the surrounding world, retain control and have the adequate conditions to judge, understand and freely make decisions which are the essential constitutive ingredients of an unharmed self"[13]. The Torturing Environment Scale is the first scale to measure Torturing Environments based on this model[14].
-- examples
Many forms of psychological torture methods attempt to destroy the subject's normal self-image by removing them from any kind of control over their environment, creating a state of learned helplessness, psychological regression and depersonalization. Other techniques include forced nudity and head shaving, sleep deprivation, hooding and other forms of sensory deprivation.
A strictly fear-inducing method is the mock execution. Various threats operate on the same fear-inducing principle.
Another method is indirect torture, in which a victim is forced to witness the torture of another person, often a loved one. This preys on the victim's affection for and loyalty to a partner, relative, friend, comrade-in-arms, etc, whose real pain induces vicarious suffering in the targeted psychological victim, who is thus loaded with guilt but spared physical harm that might affect his or her ability to comply.
While psychological torture may not leave any lasting physical damage—indeed, this is often one of the motivations for using psychological rather than physical torture—it can result in similar levels of permanent mental damage to its victims.[4]
-- authors
Psychological torture methods were devised by, and in conjunction with, doctors and psychologists.[5] Medical participation in torture has taken place throughout the world and was a prominent feature of the US interrogation practice in military and Central Intelligence Agency (CIA) facilities.[6][7]