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The Monthly Lecture Meeting

The Stroop test has been used for more than half a century to study cognitive paradigm. It consists of presenting the subject with color words in different color font, he then has to tell the color of the font, but the conflicting information makes this more difficult. Nowadays, new imaging techniques allow us to explore the brain functional aspects of this phenomenon. We used Near Infrared Spectroscopy (NIRS), a safe, non-invasive technique with still a low spatial resolution but a high temporal resolution, cheap compared to other imaging devices and which is more flexible and transportable. We looked at the stroop test performances and at the cortex activations of seventeen subjects for tests in their native tongue and in foreign languages. We found a significant difference between the stroop performance for subjects with different foreign language proficiency. This difference diminished quickly as the subject repeated the experiment and got more used to it. Moreover, the cerebral activations on the cortex area stimulated by the test were found to be linked with the language proficiently of the subjects.