BiasMemory & retrieval · Memory Bias · Entry 171
Conservatism Bias – when your memory downplays extremes
Do you remember heavy rain, but in reality, it was a full-blown storm? That’s Conservatism Bias – the tendency to recall high values (like probability or frequency) as lower than they were and low values as higher.
Where it can show up
- Historical events – disasters or crises seem less severe than they felt at the time.
- Finance & risk – investors underestimate past market crashes but overestimate minor fluctuations.
- Personal success & failure – achievements feel less impressive, and failures seem less dramatic over time.
A practical countermeasure
- Trust data, not memory – your brain naturally smooths out extremes.
- Record key events – writing down numbers and details helps evaluate them objectively later.
- Remember that time dulls emotions – past stress or joy often feels weaker in hindsight.