29 lines
4.4 KiB
Markdown
29 lines
4.4 KiB
Markdown
---
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title: "Bicameral mentality"
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chunk: 1/5
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source: "https://en.wikipedia.org/wiki/Bicameral_mentality"
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category: "reference"
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tags: "science, encyclopedia"
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date_saved: "2026-05-05T08:50:16.060514+00:00"
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instance: "kb-cron"
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---
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Bicameral mentality is a psychological hypothesis proposed by American psychologist Julian Jaynes. It suggests that early modern humans experienced thoughts and emotions not as originating within themselves but as commands from external "gods". According to the theory, the human mind once functioned with a division in which one part generated verbal instructions while a second part obeyed, forming a "bicameral mind". The eventual collapse of this mental structure is proposed to have led to the development of self-reflective consciousness in humans.
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The term was coined by Jaynes, who presented the idea in his 1976 book The Origin of Consciousness in the Breakdown of the Bicameral Mind, wherein he makes the case that a bicameral mentality was the "normal and ubiquitous state" of the human mind as recently as 3,000 years ago, at the end of the Bronze Age.
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== The Origin of Consciousness in the Breakdown of the Bicameral Mind ==
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Jaynes uses "bicameral" (two chambers) to describe a mental state in which the experiences and memories of the right hemisphere of the brain are transmitted to the left hemisphere via auditory hallucinations. The metaphor is based on the idea of lateralization of brain function, although each half of a normal human brain is constantly communicating with the other through the corpus callosum. The metaphor is not meant to imply that the two halves of the bicameral brain were "cut off" from each other but that the bicameral mind was experienced as a different, nonconscious mental schema wherein volition in the face of novel stimuli was mediated through a linguistic control mechanism and experienced as auditory verbal hallucinations.
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=== Definition ===
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Bicameral mentality is nonconscious in its inability to reason and articulate about mental contents through meta-reflection, reacting without explicitly realizing and without the meta-reflective ability to give an account of why one did so. The bicameral mind thus lacks metaconsciousness, autobiographical memory, and the capacity for executive "ego functions" such as deliberate mind-wandering and conscious introspection of mental content. When bicameral mentality as a method of social control was no longer adaptive in complex civilizations, this mental model was replaced by the conscious mode of thought, which, Jaynes argued, is grounded in the acquisition of metaphorical language
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learned by exposure to narrative practice.
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According to Jaynes, ancient people in the bicameral state of mind experienced the world in a manner that has some similarities to that of a person with schizophrenia. Rather than making conscious evaluations in novel or unexpected situations, the person hallucinated a voice or "god" giving admonitory advice or commands and obeyed without question: one was not at all conscious of one's own thought-processes per se. Jaynes's hypothesis is offered as a possible explanation of "command hallucinations" that often direct the behavior of those with first-rank symptoms of schizophrenia, as well as other voice-hearers.
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=== Influences ===
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==== Regarding Homeric psychology ====
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Eric Robertson Dodds wrote about how ancient Greek thought may have not included rationality as defined by modern culture. In fact, the Greeks may have known that an individual did things, but the reason they did things was attributed to divine externalities, such as gods or daemons. Bruno Snell in 1953 thought that in Homeric Greek psychology there was no sense of self in the modern sense. Snell then describes how Greek culture "self-realized" the modern "intellect". Arthur William Hope Adkins, building on Snell's work, wrote about how ancient Greek civilization developed ego-centered psychology as an adaptation to living in city-states, before which the living in Homeric oikos did not require such integrated thought processes.
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==== Regarding neurological models ====
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The neurological model in The Origin of Consciousness in the Breakdown of the Bicameral Mind is a radical neuroscientific hypothesis that was based on research novel at the time, mainly on Michael Gazzaniga's split-brain experiments and left-brain interpreter theory. The more general idea of a "divided self" (contrasted with a "unitary self") has found support from psychological and neurological studies. |