Instructions: A word will appear in a colored ink. Click the button matching the ink color (not the word it spells). Respond as quickly as possible.
Trial 1 of 20
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Accuracy
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Avg. response time
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Congruent trials
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Incongruent trials
About the Stroop Test
The Stroop effect (1935) shows that naming the ink color of a color-word is slower when the word and color conflict (e.g., the word "RED" printed in blue ink). The interference measures the speed of cognitive processing and executive function. The Stroop difference (incongruent − congruent response time) is called the Stroop effect and is typically 100–200ms. Used clinically to detect frontal lobe dysfunction and in cognitive psychology research.