Existing procedures of inducing experimental stress in fMRI experiments are usually unrelated to the cognitive task which is the object of the study. Our experiment concerns the impact of experimental stress on well learned tactile discrimination task. Participants attended two weeks Braille training. The object of this training is not to learn people how to read braille, but to learn tactile discrimination of meaningful signs. Discrimination of two Braille signs is a simple task after the training. We tested the effect of experimental induced stress on this model of learning. For this purpose, we have developed a procedure for inducing experimental stress. This procedure consists of three parts by: two runs of tactile discrimination are divided by stress inducing procedure. In the stress inducing procedure participants are asked to discriminate between symmetrical and non-symmetrical signs and are exposed to negative feedback. Experimental stress was evaluated by a questionnaire and GSR, EMG and heart rate data were acquired during whole procedure. Results showed inducement of experimental stress reported by participants in a questionnaire, higher GSR values during experimental stress procedure and no impact of experimental stress on the performance in the second tactile discrimination task. The project was supported by The National Science Centre, grant number: 3608/B/H03/2011/40.
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