How to Interpret Your Stroop Test Results
After completing a Stroop Test, you'll receive three key scores: accuracy, average reaction time, and interference score. Here's exactly what each one means and how you compare to population norms.
✅ 1. Accuracy
Your percentage of correct responses. High accuracy with slow RT indicates a speed-accuracy tradeoff — you're being careful rather than fast. Both should be optimized simultaneously.
Below 70%Struggling
70–84%Average
85–94%Good
95%+Excellent
⚡ 2. Average reaction time
Measured in milliseconds. Reflects processing speed and attentional efficiency. Note that reaction time naturally increases with age.
| Age | Excellent | Average | Slow |
|---|---|---|---|
| 18–30 | <550ms | 550–900ms | >900ms |
| 31–50 | <650ms | 650–1000ms | >1000ms |
| 51–70 | <800ms | 800–1200ms | >1200ms |
🧠 3. Interference score — the key metric
Incongruent RT − Congruent RT. This is the purest measure of cognitive control.
<80ms 🏆 Elite
80–150ms ✅ Good
150–300ms 📊 Average
>300ms ⚠️ High
💡 Tips to improve your score
- Daily practice — interference scores measurably decrease with repeated training
- Mindfulness meditation — strengthens prefrontal inhibitory pathways
- Aerobic exercise — improves processing speed and executive function
- Sleep — deprivation dramatically worsens Stroop performance; always test when rested
- Reduce caffeine anxiety — moderate caffeine may help; high anxiety worsens interference