“School of Cognitive Sciences”
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| Paper IPM / Cognitive Sciences / 13440 |
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| Abstract: | |||||
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Introduction
Recently, many studies have considered knowing the relationship between the cognitive states and the human brain activity pattern using fMRI. In this study, the decoding of the cognitive state of the brain related to thinking about negative or positive sentences has been evaluated using the signals from fMRI.
Methods
In this study different sentences (negative or positive) presented to the subjects and brain activation recorded using fMRI. The data were collected from 6 subjects and pattern recognition methods were used for data analysis. The data was normalized to have zero mean and unit variance. Each data set then was divided into training (80Results
The best performance for the decoding of the cognitive state for the best subject was 75.6 ± 5.3 percent and the worst performance was 71.4±7.8 percent using SVM with linear kernel. All the performances were significantly better than the chance level (t-test, p<0.001).
Conclusion
These results indicate that there are different cognitive states related to thinking about the positive or negative sentences and these states can be decoded from the fMRI signals.
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