happiness

You fixate on one detail while ignoring the context.

Focalism is the tendency to focus on a single event when predicting its impact on future well-being while neglecting other aspects of one's life.

The term was introduced by Wilson et al. in 2000.

You are looking at the spotlight while ignoring the stage.

Where this comes from

Study: Wilson and Gilbert, 2003
What the check found: The definition is correct and Wilson and Gilbert are the primary architects of the field, but the term was coined in 2000, not 2003.
Confidence: Solid, with limits

One of these every day, and every one names the study it came from. When a finding is contested, it says so.