In conventional BMI technology which has focused upon such biometric signals as brain activity to control an external apparatus or to convey intention to others, there have been such problems as a large-size device being required or the operation method being complicated to a user and the noise being significant. In the present invention, a device and method are achieved which can analyze an intention within a brain with high precision and at high speed, and convey the intention in real time. The intention conveyance support device of the present invention comprises a device for presenting a visual stimulus upon a display screen, and a processing device for processing brain wave data from an electroencephalograph which measures brain waves after presentation of the stimulus by the first-mentioned device, wherein the processing device, on the basis of the product of an accumulated LDA score by a determination analysis function acquired by analyzing the brain wave data and a success rate, evaluates that a specific decision has been made within the brain when the product exceeds a threshold, and outputs the evaluation result to an apparatus.
INTENTION CONVEYANCE SUPPORT DEVICE AND METHOD