Ernst Jentsch was born in 1867. He is a German psychiatrist and the author of On the Psychology of the Uncanny (1906). "Reference has often been made to Jentsch’s essay on the uncanny, in the vast secondary literature of psychoanalysis

Psychoanalysis

Psychoanalysis is a psychological theory developed in the late 19th and early 20th centuries by Austrian neurologist Sigmund Freud. Psychoanalysis has expanded, been criticized and developed in different directions, mostly by some of Freud's former students, such as Alfred Adler and Carl Gustav...

 after Freud, as if its content were already known, familiar and thus not requiring to be read. The essay had never before been translated into English; in as much as it now appears both familiar and unfamiliar, its reappearance here can be called ‘uncanny.’" He is the beginning factor when it comes to discussing The Uncanny Valley

Uncanny Valley

The uncanny valley is a hypothesis in the field of robotics and 3D computer animation, which holds that when human replicas look and act almost, but not perfectly, like actual human beings, it causes a response of revulsion among human observers...

.
Jentsch earned his PhD.

Translations

• Studies of psychology of sex, by Havelock Ellis
  Havelock Ellis
  Henry Havelock Ellis, known as Havelock Ellis , was a British physician and psychologist, writer, and social reformer who studied human sexuality. He was co-author of the first medical textbook in English on homosexuality in 1897, and also published works on a variety of sexual practices and...
  
  
  • translated as Die krankhaften Geschlechtsempfindungen auf dissoziativer Grundlage, 1907
• Studien über Genie und Entartung, 1910, Original by Cesare Lombroso
  Cesare Lombroso
  Cesare Lombroso, born Ezechia Marco Lombroso was an Italian criminologist and founder of the Italian School of Positivist Criminology. Lombroso rejected the established Classical School, which held that crime was a characteristic trait of human nature...