The zero.
Two thousand years ago, the ancient Maya developed one of the most advanced civilizations in the Americas. They developed a written language of hieroglyphs and invented the mathematical concept of zero. With their expertise in astronomy and mathematics, the Maya developed a complex and accurate calendar system.
The Rosenhan experiment, also known as the Thud experiment, was designed to test the reliability of psychiatric diagnoses.
The Rosenhan experiment, also known as the Thud experiment, was designed to test the reliability of psychiatric diagnoses. The participants pretended to have hallucinations in order to enter psychiatric hospitals, but then acted normally. They were given antipsychotic medication after being diagnosed with psychiatric disorders.
The study was conducted by Stanford University professor David Rosenhan and published in the journal Science in 1973 under the title "On Being Sane in Insane Places." It is regarded as a significant and influential critique of psychiatric diagnosis, and it addressed the issue of wrongful involuntary commitment. Rosenhan and eight other people (5 men and 3 women) were admitted to these 12 hospitals located in five states along the West Coast of the United States.
To learn more about Rosenhan experiment, here
brainly.com/question/14632921
#SPJ4
The 32nd president of United States was Franklin D. Roosevelt.