This is a Lexicon entry: the mechanism, when it shows up, and the countermeasure. The full correction, with real-world cases and the audit prompt, hasn't been written yet.
Definition
The evolved belief that accomplishing a specific goal will result in lasting happiness, when in reality, happiness is a moving horizon.
When it shows up
After achieving a major goal; when anticipating the happiness an achievement will bring; when 'when I get X, then I will be happy' thinking is active.
Failure mode
Making poor long-term decisions based on overestimated future wellbeing. Pursuing achievements, relationships or acquisitions whose emotional payoff evaporates on arrival.
Countermeasure
Ask people who have already achieved what you are pursuing how they actually feel now. Their reports are far more accurate than your predictions. Expect happiness to be milder and shorter than forecast.
Related concepts
Also connected in the mapGold Medalist Syndrome·The Impact Bias·Jerusalem Syndrome·The Region Beta Paradox·Sudden Wealth Syndrome·The Existential Crisis Luxury·The Hedonic Treadmill·Productivity Purgatory·Telicity·The Tocqueville Paradox·The Backwards Law·Bonhoeffer’s Theory of Stupidity·The Finality Principle·Regret Minimization
Origin
DiscoveredKorb, S. & Bhogal, G. (cited). Ben-Shahar, T. (2009). Even Happier. McGraw-Hill source ↗
Also revealed
Entry #85 of 631 in The Lexicon · see the full Lexicon