Using CogLab, complete the Stroop effect experiment and create a r eport on the experiment. In your r eport, write a brief intr

Stroop Effect Theories.html

Stroop Effect Theories

In the Stroop effect experiment, participants view words such as “red,” “green,” and “blue” appearing one at a time on the screen, and they need to identify the font color. The font color may or may not match the word appearing on the screen. Finally, the reaction times of participants are measured. 

Theory of Automatic Processing

The most common explanation is based on automatic processing. For literate adults, reading takes place effortlessly—it is an automatic practice. However, most adults do not commonly engage in color identification tasks. Therefore, being a less practiced skill, identifying a color takes some conscious effort. Adults tend to read the word quickly and automatically; however, they take more time to identify the font color.

In case the word and the font color are the same, the response is fast and mostly correct because the word identification is quick and the correct answer is not solely dependent on the font color.

In case the word and the font color are different, most participants either answer incorrectly or take more time to respond. The reason is that although participants may read the word quickly, they need time to engage in the second, time-consuming process of identifying the font color.

Theory of Response Competition

An alternative, although similar, explanation is based on response competition.

According to this theory, when adults are confronted with the Stroop task, their responses for identifying a word as well as the font color in which the word appears may be activated at the same time. This causes the responses to interfere with each other. The final outcome is that the participants tend to identify the word first and then its font color—an uncommon task for which neural pathways is not strong.

The Stoop Effect Experiment.html

The Stoop Effect Experiment

The Stroop effect was first observed by J. R. Stroop in 1935. In the experiment, the participant was presented with color names and was required to identify the color of ink used to write the names. For instance, if the word "red" was written in green color, the correct response would be green. However, if the word "red" was written in red color, the correct response would be red.

It was observed that the participant's reaction time slowed and accuracy decreased when the name of the color did not match the ink color used to write the name.

Since 1935, these results have been replicated many times, and people are continuing to develop variations based on the original experiment.

    Additional Material

     View a PDF Transcript of The Stroop Effect Experiment