What happened
You ran the same color-classification task, but the embedded words varied in emotional charge. The reaction-time gap between charged and neutral words indexes how strongly meaning captured your attention when meaning was irrelevant.
Why it happened
The brain evaluates significance pre-attentively. Charged words trigger amygdala-mediated prioritization that briefly diverts attention from the color task. It is not a conflict between responses but a tax on attention itself, which is why it appears even when the word names no color.
Experimental design
Research protocol
Within-subjects; emotional Stroop variant
- Independent variable (IV)
- Emotional valence of distractor words (neutral, threat, positive)
- Dependent variable(s) (DV)
- Reaction time to ink-color naming
- Emotional interference (RT_emotional − RT_neutral)
- Measured constructs
- Emotional attentionAnxiety-related cognitionAttentional control
- Operational definitions
Attentional bias
Preferential processing of threat- or concern-relevant stimuli
Emotional Stroop
Slowed color naming for emotionally salient words unrelated to the ink color
Attentional capture
Involuntary orienting to significant stimuli, distinct from response conflict
- Key terms
Threat hypervigilance
Faster detection or slower disengagement from threat cues in anxious individuals.
Amygdala
Subcortical structure that flags affective significance and modulates early attention.
Cognitive avoidance
Strategy of diverting attention from emotional material; can reduce interference.
The original experiment
Year
1986
Researchers
Colin MacLeod · Andrew Mathews · Philip Tata
Sample
Clinically anxious and control participants
Key finding
Anxious individuals showed systematic attentional bias toward threat content; emotional content modulates early attention.
MacLeod, C., Mathews, A., & Tata, P. (1986). Attentional bias in emotional disorders. Journal of Abnormal Psychology, 95(1), 15–20.
Where this shows up in the world
Attentional-bias measurement and modification in anxiety treatment
Warning design: emotional salience buys attention, at a cost
Content moderation workloads and attentional fatigue
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