Framework · Octalysis · Actionable Gamification
Left Brain vs Right Brain drives
Octalysis splits the octagon horizontally: left drives (CD2, CD4, CD6) lean extrinsic and goal-driven; right drives (CD3, CD5, CD7) lean intrinsic and process-driven. Chou says the labels are a metaphor, not neuroscience. His rule: lure with extrinsic rewards if needed, then move people toward right-brain motivation.
Plain label: extrinsic vs intrinsic tendencyAlso known as: Left Brain, Right Brain, extrinsic vs intrinsic
The axis
- Left (extrinsic tendency): Accomplishment, Ownership, Scarcity. People act for the goal or the reward, even when the task itself is unpleasant.
- Right (intrinsic tendency): Creativity, Social Influence, Curiosity. The activity is rewarding in itself.
- On the vertical axis: Meaning (top) and Loss (bottom) have no side.
Chou is explicit that "left" and "right" are symbolic, not claims about brain anatomy; he jokes he could have used other names. Use dual-process language when scientific framing is needed. Octalysis also counts mastery as extrinsic because it is goal-driven, which differs from Self-Determination Theory in wording.
Rules Chou draws from it
- Removal Test (OCT-M10): imagine removing the goal, the reward and all accumulated progress. Would people still do the action? Social play and creative puzzles pass; collecting and points usually fail.
- Crowding out (OCT-M11): rewarding an activity people already enjoy can push out their own reason for doing it, and offering money flips social norms into market norms. See OCT-M11.
- Lure, bridge, sustain (OCT-M12): attract with a concrete reward, bridge with recognition, status and access, then sustain with right-brain drives. See OCT-M12.
- Never keep running the month-one reward campaign; it ends in staleness and burnout.
How Gamify It reads brain balance [Analyst]
Right present means at least one of CD3, CD5 or CD7 is rated Clear or above in the phase; left-only means only left drives reach Clear. A left-only Return or Stay loop is Chou's prediction of engagement that falls when rewards stop (grade Evidence grade D. Practitioner framework or anecdote: plausible, untested.). The overjustification research behind it is stronger but conditional: expected, tangible, contingent rewards undermine intrinsic motivation most, while unexpected rewards and informational praise do much less harm.
Limits
What we don’t claim
- Octalysis is a practitioner framework built from observing games, not a validated scientific model.Actionable Gamification Ch.15, pp.399-400
- Left Brain and Right Brain are a metaphor for extrinsic and intrinsic motivation, not a claim about neuroscience.Actionable Gamification Ch.13, pp.342-343
Sources
Actionable Gamification · Yu-kai Chou
Ch.13, p.342 · Ch.13, p.343 · Ch.13, p.345 · Ch.13, p.347 · Ch.13, p.356 · Ch.13, p.360 · Ch.13, p.368 · Ch.7, p.123 · Ch.8, p.160 · Ch.9, p.195 · Ch.10, p.230 · Ch.11, p.269 · Ch.13, p.359
Source IDs: CD2CD3CD4CD5CD6CD7OCT-M10OCT-M11OCT-M12
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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