Identify Subconscious Visual Response from Brain Signals
Subconsciously, humans can recognize objects and events from various depths of memory. When such things are experienced, our brain responds with certain signals. In this research, we have identified specific bands of signals that become distinct while experiencing memorized visual objects in short bursts of time. Rapid serial visual presentation (RSVP) of images where recognition time is less than the time taken for conscious visual recognition of target images are about 13 ms/image. Subconscious reflection has a relationship with retinal response particularly in pupil dilation. So, we have assumed that the occipital lobe, that is responsible for our sight, visual stimuli and recalling old memories, gives a retinal response and is associated with the memorized object of interest. A set of 200 grayscale images, including the image of interest, were presented for 6 to 12 ms intervals, in RSVP series, to human subjects. When the target image(s) slides change, subconsciously, the retina responds in connection with neural activities. These neural activities are the action of neurons and generate neural signals. Those were captured through an EEG device. Analyzing the behavior and the amplitude of the EEG signals, we have found that the subconscious visual response has a very high frame rate.
KeywordsRSVP Recognition Identification Retinal response Subconscious Memorized object
Foremost, we would like to express our sincere gratitude to all the volunteers who participated in this nonpaid research and gave us their valuable time in cooperation with us.
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