#科技头条#【算法预测人类自杀倾向】

#科技头条#【算法预测人类自杀倾向】由Marcel博士领衔的一个国外研究团队近日通过针对人脑的磁共振扫描研究发现:人脑特定区域的活动很可能与其是否具备自杀意愿有关,而该活动模式所反应出的磁共振可以通过机器学习算法进行识别。在实验中,该算法的预测准确率高达91%,但Marcel博士称该方式并不是很准确。

An algorithm could identify suicidal feelings based on brain scans

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It's difficult to identify whether or not someone is feeling suicidal by asking. According to studies, roughly 80 percent of those who go through with the act denied feeling suicidal the last time they spoke to a mental health care expert. However, AI-related technology -- which is also being applied to things like spotting cancerous cells -- might offer a way to identify these thoughts and prompt a timely intervention. Researchers have developed a machine learning algorithm that identifies suicidal tendencies based on activity in specific brain regions.

Based on fMRI scans, the team learned that certain keywords sparked activity in mostly different brain regions depending on whether or not someone was feeling suicidal. With that knowledge, the team produced an algorithm that can measure the overall brain activity and determine when activity in suicide-linked regions is particularly strong. The system is 91 percent accurate in tests and is as trustworthy in identifying unaffected people as those with suicidal thoughts.

On the left is the brain activation pattern for "death" in participants who had made a suicide attempt. The image in the right depicts the activation pattern for "death" in control participants.

Lead author Dr. Marcel Just was quick to warn The Methods Man that this isn't a guaranteed method for revealing suicidal thoughts, at least not in its present form. The conclusions came from 30-minute sessions in giant MRI scanners, which are neither practical for therapists' offices nor particularly inviting. Also, everyone in the study was a volunteer. It remains to be seen whether or not a suicidal person who hasn't confessed their feelings will produce the same results. If they know doctors are looking for specific brain activity, they may suppress their reactions in a bid to avoid divulging their true thoughts. Even so, this raises the possibility that AI could reveal these cues in the future by using less conspicuous equipment and testing methods.

https://www.engadget.com/2017/11/01/an-algorithm-could-identify-suicidal-feelings-based-on-brain-sca/


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