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A technique in which a computer model visualises perception by monitoring human brain signals has been developed by a team of researchers. The model works in a way as if the computer tries to imagine what a human is thinking about.As a result of this imagining, the computer is able to produce entirely new information, such as fictional images that were never before seen. The study was published in the Scientific Reports journal in September. Scientific Reports is an online multidisciplinary, open-access journal from the publishers of Nature.The technique is based on a novel brain-computer interface. Previously, similar brain-computer interfaces have been able to perform one-way communication from brain to computer, such as spell individual letters or move a cursor.As far as is known, the new study is the first where both the computer's presentation of the information and brain signals were modelled simultaneously using artificial intelligence methods. Images that matched the visual characteristics that participants were focusing on were generated through interaction between human brain responses and a generative neural network.*Neuroadaptive generative modellingThe researchers call this method neuroadaptive generative modelling. A total of 31 volunteers participated in a study that evaluated the effectiveness of the technique. Participants were shown hundreds of AI-generated images of diverse-looking people while their EEG was recorded.The subjects were asked to concentrate on certain features, such as faces that looked old or were smiling. While looking at a rapidly presented series of face images, the EEGs of the subjects were fed to a neural network, which inferred whether any image was detected by the brain as matching what the subjects were looking for.Based on this information, the neural network adapted its estimation as to what kind of faces people were thinking of. Finally, the images generated by the computer were evaluated by the participants and they nearly perfectly matched with the features the participants were thinking of. The accuracy of the experiment was 83 per cent."The technique combines natural human responses with the computer's ability to create new information. In the experiment, the participants were only asked to look at the computer-generated images. The computer, in turn, modelled the images displayed and the human reaction toward the images by using human brain responses. From this, the computer can create an entirely new image that matches the user's intention," says Tuukka Ruotsalo, Academy of Finland Research Fellow at the University of Helsinki, Finland, and Associate Professor at the University of Copenhagen, Denmark.*Unconscious attitudes may be exposedGenerating images of the human face is only one example of the technique's potential uses. One practical benefit of the study may be that computers can augment human creativity."If you want to draw or illustrate something but are unable to do so, the computer may help you to achieve your goal. It could just observe the focus of attention and predict what you would like to create," Ruotsalo says. However, the researchers believe that the technique may be used to gain an understanding of perception and the underlying processes in our mind."The technique does not recognise thoughts but rather responds to the associations we have with mental categories. Thus, while we are not able to find out the identity of a specific 'old person' a participant was thinking of, we may gain an understanding of what they associate with old age. We, therefore, believe it may provide a new way of gaining insight into social, cognitive, and emotional processes," says Senior Researcher Michiel Spape.According to Spape, this is also interesting from a psychological perspective."One person's idea of an elderly person may be very different from another's. We are currently uncovering whether our technique might expose unconscious associations, for example by looking if the computer always renders old people as, say, smiling men."( With inputs from ANI )Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Lifestyle :A computer that predicts your thoughts, creates images based on them

A technique in which a computer model visualises perception by monitoring human brain signals has been developed by a team of researchers. The model works in a way as if the computer tries to imagine what a human is thinking about. ...