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The Stroop test

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Stroop test

In psychology, the effect Stroop indicates the interference observed between a main task and an interfering cognitive process.

For example enter the fact of having to name a color ( main task) in which is written a word, and a word itself which is the name of the another color, the interference being caused by a mental process of automatic reading.

This interference shows itself by a longer response time when we ask to name the color in which is written a word while the color which it indicates is different (for example, the green word written in red) compared with a situation in which the word and the color correspond (the yellow word written in yellow).

The reading (which consists above all of a recognition of the words) would be made then in the occipito-parietal zone of the brain (whereas the fact of naming the color appeals to the frontal lobe).

The name of this effect comes from the name of the one who discovered it, the psychologist John Ridley Stroop.


The conduct of Stroop test

This test consists of 3 tests of 45 seconds each:

1- First test (45 seconds)

- Card A: 50 names of colors written in black and white

- Read the words by following lines, and as quickly as possible

- When we arrive at the end of the page, we begin again



2- Second test (45 seconds)

- Card C: 50 rectangles of colors

- Name the color of rectangles by following lines, and as quickly as possible

- When we arrive at the end of the page, we begin again



3- Third test (45 seconds)

- Card B: 50 names of colors written in a different color from the name of the color

- Line by line, give the color of the ink with which is written the word and not the word itself, and as quickly as possible

- When we arrive at the end of the page, we begin again



Calculate the result of the Stroop test

calculation will depend on the age of the person.

Interest of the stroop test:

The stroop test is going to be used to bring to light certain intellectual dysfunctions such as:

- The schizophrenia, the compulsive obsessional disorders (OBSESSIVE-COMPULSIVE DISORDER), the depression

- Tumors and brain traumas

- Cortical degenerative affections:

- frontotemporal dementias (Pick's Disease in particular)
- Lewy body dementia

- Sub-cortical degenerative affections:

- Steele's disease,
- Richardson and Olszewski's disease,
- Parkinson's disease,
- Huntington's disease

- The overdrawn disorders of the attention (or TDA): hyperactivity for example