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“School of Cognitive Sciences”

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Paper   IPM / Cognitive Sciences / 13440
School of Cognitive Sciences
  Title:   Decoding the human cognitive states related to the negative and positive sentences: study using fMRI
1.  M.R. Daliri
2.  M. Behroozi
  Status:   In Proceedings
  Proceeding: 2nd Neuroscience conference, December 18-20, 2013
  Year:  2013
  Supported by:  IPM
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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