Five Monkeys Experiment illustration
Management / Organizational Culture / Behavioral Science
Management / Organizational Culture / Behavioral Science

Five Monkeys Experiment

Practices persist long after their cause is gone.

Popularity
Usefulness
Aliases
Monkey-ladder story / "that's how we've always done it" / monkey-banana experiment
Domains
Organizational behavior, culture, tradition, change management

Definition

  • The Five Monkeys Experiment is a parable about how rules and customs can outlive their original reason, passed on until no one remembers why they exist.

Core Idea

  • Practices persist long after their cause is gone.
  • New members learn "this is how it's done" without knowing why.
  • Questioning inherited customs that nobody can explain is essential to healthy change.

How It Works

  • An original deterrent (a punishment) establishes a behavior.
  • Even after the deterrent is removed, the group enforces the behavior on newcomers.
  • As members are replaced, the rule survives with no one who knows its origin.

Usage Example

  • A company keeps a cumbersome approval step everyone follows, though the policy it once served was abolished years ago, because newcomers are simply told "that's the process."

Famous Example

  • Example: The story of five monkeys sprayed with water when one climbs for a banana, who then beat any monkey that tries — continuing even after all original monkeys are replaced.
  • Why it fits this rule: The taboo persists with no monkey who experienced the spray.
  • Verification status: The story is widely told but is a parable; the specific experiment as described is not a verified scientific study.

Use Cases / Situations Where It Applies

  • Auditing outdated rules and rituals.
  • Encouraging "why do we do this?" questioning.
  • Change management and culture renewal.

When Not to Use or Common Misuse

  • Do not assume every tradition is pointless; many encode real lessons.
  • Do not cite it as a proven experiment.
  • Do not discard rules before understanding their original purpose.

Rule Invention / Origin

  • Invented by: Popular business parable, loosely inspired by primate-conformity research.
  • Year of invention: Spread widely in late-20th-century management writing.
  • Country / context of origin: Western management folklore.

Evidence / Research Basis

  • Genuine research on conformity and cultural transmission supports the moral, even though the literal five-monkeys story is apocryphal.