Loneliness drives cognitive impairment, can lead to shorter life, study suggests
Peer-Reviewed Publication
Updates every hour. Last Updated: 17-Jun-2026 07:16 ET (17-Jun-2026 11:16 GMT/UTC)
Some people might not mind spending time alone, but new research with data from 18 countries suggests that older people who struggle with loneliness — rather than strictly being alone — may experience a faster mental and physical decline.
The study, led by the University of California, Davis, used advanced statistical modeling to chart loneliness and social isolation as older adults move through stages of cognitive impairment and mortality. The results suggest that loneliness plays a much stronger role in cognitive impairment and shorter life spans than social isolation on its own.
Based on the underlying paper, the key innovation is not simply better toxicity detection, but an adaptive cascade of AI models. Instead of sending every post through a large, computationally expensive detector, the system starts with faster, lightweight classifiers. If a piece of content is clearly benign or clearly toxic, a decision is made immediately. Only ambiguous cases are passed to increasingly powerful models. A reinforcement-learning algorithm decides which model to consult next, balancing speed, accuracy and computing cost. This approach dramatically increases throughput while slightly improving detection accuracy. (ScienceDirect)
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Concordia researchers have developed an AI system that detects toxic online content faster and more accurately by combining multiple detection models in an adaptive sequence. Simple cases are screened by lightweight classifiers, while only difficult content is sent to more powerful AI tools. The approach improves accuracy while processing content up to nine times faster than conventional methods.
Depression may shape how much children pay attention to emotional expressions – sad or happy faces – and those changes appear to depend on whether the child has a family history of depression, according to a first-of-its-kind study from Binghamton University, State University of New York.
More than three-quarters of psychologists report their patients are discussing artificial intelligence in therapy, using the technology to seek additional support with their mental health, find a diagnosis or for friendship and intimate relationships, according to a survey by the American Psychological Association.