Why humans need fiction, according to neuroscience

Scientific concepts, discoveries, and nature phenomena presented

• Interpreter / narrative-generating brain process (left hemisphere)

  • A “little narrator” system in the left hemisphere converts unconscious brain activity into a coherent, unified story of what happened.
  • Consciousness is framed as non-linear: what we experience as a continuous narrative is a convenient story generated for perception—often described as “viewing pleasure”—by the unconscious brain.
  • This system is described as continually seeking explanations for behavior, including explanations that feel intuitive after the fact.

• Split-brain research (disconnected hemispheres)

  • Early-career split-brain patients were studied to determine hemisphere functions.
  • Speech localization is described as occurring in one hemisphere (implied: the left hemisphere).

• Evidence for post-hoc confabulation/explanation in the left hemisphere

  • In a task where information is presented to the right (non-speaking) hemisphere and speech output comes from the left (speaking) hemisphere:
    • Example described: Bell vs. Music (with Joe able to see/associate two items).
    • When asked why the subject made a certain choice (e.g., pointing to Bell), the speaking left hemisphere constructs a plausible explanation (“Music”), even if other options more directly match the non-speaking input.
  • Core idea: the left hemisphere explains actions and moods after they occur, sometimes using story-like rationalizations rather than directly accessing the underlying drivers.

• Chunking and sampling in speech/meaning

  • People do not perceive language as strictly syllable-by-syllable or word-by-word in conscious awareness.
  • The unconscious mind performs chunking/interpretation, using context to determine meaning (e.g., “mouse pad” vs. “rodent” depending on the sentence).
  • This is presented as a mechanism by which unconscious processing builds narratives that reach consciousness.

• Why humans like fiction (functional hypothesis)

  • The narrative-making tendency may cause humans to prefer fiction because it:
    • Prepares us for unexpected events by rehearsing scenarios in fantasy.
    • Lets us “live through the movie,” making real-life encounters feel familiar, interpretable, and manageable.

Researchers / sources featured (as stated)

• Doctor Gazzaniga (implied: Michael Gazzaniga)
• Joe (named as the subject in the described example; not a researcher)