
Hervey Milton Cleckley was an American psychiatrist and pioneer in the field of psychopathy. His book, The Mask of Sanity, originally published in 1941 and revised in new editions until the 1980s, provided the most influential clinical description of psychopathy in the twentieth century. The term "mask of sanity" derived from Cleckley's belief that a psychopath can appear normal and even engaging, but that the "mask" conceals a mental disorder. By the time of his death, Cleckley was better remembered for a vivid case study of a female patient, published as a book in 1956 and turned into a movie, The Three Faces of Eve, in 1957. His report of the case (re)popularized in America the controversial diagnosis of multiple personality disorder. The concept of psychopathy continues to be influential through forming parts of the diagnosis of antisocial personality disorder, the Psychopathy Checklist, and public perception.

In psychology, the dark triad comprises the personality traits of narcissism, Machiavellianism, and psychopathy. They are called "dark" because of their malevolent qualities.

Dezinformatsia: Active Measures in Soviet Strategy is a non-fiction book about disinformation and information warfare used by the KGB during the Soviet Union period, as part of their active measures tactics. The book was co-authored by Richard H. Shultz, professor of international politics at Tufts University, and Roy Godson, professor emeritus of government at Georgetown University.

Disinformation: Former Spy Chief Reveals Secret Strategies for Undermining Freedom, Attacking Religion, and Promoting Terrorism is a non-fiction book about disinformation tactics and history rooted in information warfare. It was written by former three-star general in the Securitate, the secret police of Socialist Republic of Romania, Ion Mihai Pacepa, and law professor Ronald J. Rychlak. It was published in 2013 along with a companion film, Disinformation: The Secret Strategy to Destroy the West.

Empathy is the capacity to understand or feel what another person is experiencing from within their frame of reference, that is, the capacity to place oneself in another's position. Definitions of empathy encompass a broad range of emotional states. Types of empathy include cognitive empathy, emotional empathy, and somatic empathy.

Guilt is an emotional experience that occurs when a person believes or realizes—accurately or not—that they have compromised their own standards of conduct or have violated universal moral standards and bear significant responsibility for that violation. Guilt is closely related to the concept of remorse as well as shame.

The Psychopathy Checklist or Hare Psychopathy Checklist-Revised, now the Psychopathy Checklist—revised (PCL-R), is a psychological assessment tool most commonly used to assess the presence of psychopathy in individuals—most often those institutionalized in the criminal justice system—and to differentiate them from those suffering from antisocial personality disorder, a similar but distinct illness. It is a 20-item inventory of perceived personality traits and recorded behaviors, intended to be completed on the basis of a semi-structured interview along with a review of 'collateral information' such as official records.

In psychology, impulsivity is a tendency to act on a whim, displaying behavior characterized by little or no forethought, reflection, or consideration of the consequences. Impulsive actions are typically "poorly conceived, prematurely expressed, unduly risky, or inappropriate to the situation that often result in undesirable consequences," which imperil long-term goals and strategies for success. Impulsivity can be classified as a multifactorial construct. A functional variety of impulsivity has also been suggested, which involves action without much forethought in appropriate situations that can and does result in desirable consequences. "When such actions have positive outcomes, they tend not to be seen as signs of impulsivity, but as indicators of boldness, quickness, spontaneity, courageousness, or unconventionality" Thus, the construct of impulsivity includes at least two independent components: first, acting without an appropriate amount of deliberation, which may or may not be functional; and second, choosing short-term gains over long-term ones.

Empathy is the capacity to understand or feel what another person is experiencing from within their frame of reference, that is, the capacity to place oneself in another's position. Definitions of empathy encompass a broad range of emotional states. Types of empathy include cognitive empathy, emotional empathy, and somatic empathy.

Juvenile delinquency, also known as "juvenile offending", is the act of participating in unlawful behavior as a minor or individual younger than the statutory age of majority. For example, in the United States of America a juvenile delinquent is a person who is typically below 18 years of age and commits an act that otherwise would have been charged as a crime if they were an adult. Juvenile crimes can range from status offenses, to property crimes and violent crimes.

The KGB and Soviet Disinformation: An Insider's View is a non-fiction book about the KGB's use of disinformation and information warfare during the Soviet Union period. It was written by former intelligence officer specializing in disinformation for the Czech Intelligence Service and retired professor of disinformation at Boston University, Ladislav Bittman.

Guilt is an emotional experience that occurs when a person believes or realizes—accurately or not—that they have compromised their own standards of conduct or have violated universal moral standards and bear significant responsibility for that violation. Guilt is closely related to the concept of remorse as well as shame.

Recidivism is the act of a person repeating an undesirable behavior after they have either experienced negative consequences of that behavior, or have been trained to extinguish that behavior. It is also used to refer to the percentage of former prisoners who are rearrested for a similar offense.

Remorse is a distressing emotion experienced by an individual who regrets actions which they have done in the past that they deem to be shameful, hurtful, or wrong. Remorse is closely allied to guilt and self-directed resentment. When a person regrets an earlier action or failure to act, it may be because of remorse or in response to various other consequences, including being punished for the act or omission. People may express remorse through apologies, trying to repair the damage they've caused, or self-imposed punishments.

Remorse is a distressing emotion experienced by an individual who regrets actions which they have done in the past that they deem to be shameful, hurtful, or wrong. Remorse is closely allied to guilt and self-directed resentment. When a person regrets an earlier action or failure to act, it may be because of remorse or in response to various other consequences, including being punished for the act or omission. People may express remorse through apologies, trying to repair the damage they've caused, or self-imposed punishments.

The Return!!! is the sixth album released by rapper, Ganxsta NIP. It was released on November 11, 2003 through Rest In Peace / Black Market Records and featured production from 151, Dope E, J.B. Money and K-Rino. The entire project was headed by Mars.

Sadistic personality disorder is a personality disorder involving sadism which appeared in an appendix of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III-R). The later versions of the DSM do not include it.

A serial killer is typically a person who murders three or more people, usually in service of abnormal psychological gratification, with the murders taking place over more than a month and including a significant period of time between them. While most authorities set a threshold of three murders, others extend it to four or lessen it to two.

Crocodile tears is a false, insincere display of emotion such as a hypocrite crying fake tears of grief.

Shmuel "Sam" Vaknin is an Israeli writer. He is the author of Malignant Self Love: Narcissism Revisited (1999), was editor-in-chief of political news website Global Politician, and runs a private website about narcissistic personality disorder (NPD). He has also postulated a theory on chronons and time asymmetry.