BIOPAC® Systems, Inc. Logo

H30 Stroop Effect

This PRO Lesson explains how to run a classic Stroop test using SuperLab to deliver the stimuli.

If the word “red” is printed in blue ink how will the interference of the ink-color “blue” upon reading the printed word “red” compare with the interference of the printed word “red” upon calling the name of the ink-color “blue?” The increase in time for reacting to words caused by the presence of conflicting color stimuli is taken as the measure of the interference of color stimuli upon reading words. The increase in the time for reacting to colors caused by the presence of conflicting word stimuli is taken as the measure of the interference of word stimuli upon naming colors. (p. 646-647)

—Stroop, J.R. (1935). Studies of interference in serial verbal reactions. Journal of Experimental Psychology, 18, 643-662.
Select hardware and graph template (.gtl) download for MP3X and download SuperLab presentation files for SuperLab4 (.slx) or earlier (.xpt); SuperLab 4 cannot read experiments created with earlier versions of SuperLab.

Experimental Objectives

  1. To measure and compare strength of interference between two associative tasks: naming and reading.
    1. To measure and compare reaction time for the effect of word and visual interference.
    2. To measure, compare, and correlate the interference of color stimuli upon reading words.
    3. To measure, compare, and correlate the interference of word stimuli upon naming colors.

Tasks Performed by the Student

Subject will:


Biopac Student Lab Student Download

Student Prep & Distance Learning

Click the link(s) below for sample data and/or lesson procedure video(s), BSL PRO Lesson procedures (PDF) for human lessons*, and graph template files (*.gtl) for BSL PRO Lessons. If more than one .gtl is available, download the .gtl with the _suffix to match BSL version and hardware.

Lesson Hardware

This lesson requires a Biopac Student Lab (BSL) System and the following hardware. If your BSL System does not include all hardware items, expand your system by selecting required items below. For more details, review the Lesson: L# BSL Lessons - see the Lab Manual or launch BSL; A# and H# BSL PRO Lessons, click the PDF link above to review full setup, recording, and analysis procedures.

Item Name Cart
STP35W SuperLab System for MP36/35 or MP36R Add to Cart
SS10L Push Button Hand Switch - MP3X/45 Add to Cart
Spotlight On
continuous NIR spectroscopy (NIRS) module

fNIR Imaging Systems

fNIR Imaging Systems are stand-alone functional brain imaging solutions for continuous NIR spectroscopy (NIRS). They provide an in-lab cognitive function assessment and eliminate a great many of the drawbacks of a functional MRI. fNIR optical imaging technology measures neural activity and hemodynamic response in the prefrontal cortex. Subjects wear an fNIR sensor (IR light sources […]

View All
Latest News

NEWS CITATIONS – Heart Rate & Heart Rate Variability, Wingate Anaerobic Test, and Neuroscience of Music

BIOPAC provides software and hardware that allow for research teams to record and analyze respiration activity in physiological experimentation. Here are a few notable studies covering HRV, EMG, and EEG measurement. HRV (Jing Wei, Hong Luo, Si J. Wu, Paul P. Zheng, Genyue Fu, and Kang Lee) Humans encounter various stressful situations everyday at work, home, and school. Such stress when experienced at high degrees and/or […]

What makes you laugh the most?

Alan Macy Answers Proust Questionnaire BIOPAC co-founder and R&D Director, Alan Macy, was interviewed recently by Roger Durling for the Santa Barbara Independent. The article, “The S.B. Questionnaire: Alan Macy,” provided a background excerpt of the Santa Barbara entrepreneurs’ past as well as his answers to the Proust Questionnaire. The biomedical technology developed at BIOPAC reflects an ambitious […]

Read All
Request a Demonstration
Request a Demonstration