Affect Heuristic, explained.
The affect heuristic uses an overall positive or negative feeling as a shortcut when assessing an option’s risks or benefits.
Why it happens
An appealing impression can make benefits easier to notice and costs less salient. Those feelings may be relevant to preferences, but a stated numerical criterion still requires evidence about outcomes.
A positive or negative feeling can act as a shortcut when judging benefits and risks. Feelings are information, but do not replace task-specific evidence.
Read the result
Make an initial choice from names, reveal the invented benefit and cost figures, then choose again. The feedback records both choices and identifies the higher net benefit without diagnosing your judgment.
A worked example
A project with an inviting name
Bright Horizon offers benefit 20 at cost 8; Storm Plan offers 25 at cost 7.
Their invented net benefits are 12 and 18 respectively.
If maximizing net benefit is the criterion, the less inviting name should not outweigh the relevant outcome comparison.
OPTIONAL DEEPER DETAILGo deeper: inside the model
Inside this model
Bright Horizon and Storm Plan have invented net benefits of 12 and 18. An initial choice is followed by the same cost-benefit evidence for both; the program records whether your choice changes.
Where this idea is useful
A practical use
An appealing project name can shape a first impression before its costs and benefits are considered.
A common misconception
“Emotions have no place in decisions.”
Feelings can represent important preferences. The useful distinction is between a preference and an unsupported inference about risk or benefit.
What this explanation leaves out
- Names are illustrative cues, not a controlled emotional manipulation. Neither choice diagnoses a bias.
Does changing my choice prove an affect bias?
No. The initial stage deliberately withholds evidence, so revising a choice can simply reflect learning new information.
Are you evaluating an option’s measured properties or your reaction to how it is described?
Associated thinkers
Further reading
Explore the original research or the teaching reference behind this experiment.