AI Insight
This review article introduces the concept of Functional Social Isolation (FSI), a state where individuals are physically present with others but psychologically disconnected due to digital device immersion. The authors identify five key behavioral correlates of FSI including attentional fragmentation, problematic online engagement, emotional volatility, avoidance of in-person interaction, and diminished offline social skills. The review proposes a hypothetical neurobiological framework involving oxytocin, dopamine, norepinephrine, endocannabinoids, serotonin, and cortisol as potential mechanistic pathways, though current evidence remains indirect and overlaps with other conditions like traditional isolation, stress, and depression.
Why it matters
This framework could inform interventions to reduce digital interruptions during face-to-face interactions and promote meaningful social engagement in an increasingly digital society. Understanding FSI may help address emerging mental health challenges related to chronic digital immersion and guide public health strategies for improving social connectedness.
Understand the Science
Functional Social Isolation (FSI) describes a proposed form of social disconnection in the digital era, wherein individuals are physically co-present yet psychologically detached during pervasive digital immersion. This review examines how everyday digital immersion may contribute to persistent social disengagement, outlines its behavioral correlates and potential neurobiological pathways, and discusses its implications for public health and behavioral psychology. By synthesizing emerging literature on co-present digital immersion, social buffering, and neuroendocrine regulation, we identify five behavioral correlates relevant to FSI: attentional fragmentation, habitual or problematic online engagement, emotional volatility, avoidance of offline social interaction, and reduced practice of offline social skills. We also consider evidence concerning oxytocin, dopamine, norepinephrine, endocannabinoids, serotonin, and cortisol, alongside models of internet-related behaviors. These systems may represent candidate pathways linking digital immersion, attentional capture, affective regulation, and reduced engagement with available social partners. However, current neurobiological evidence is largely indirect and is not specific to FSI; similar patterns may arise from traditional social isolation, chronic stress, sleep disturbance, anxiety, or depression. We therefore present a hypothetical multi-system framework intended to generate testable predictions rather than establish an FSI-specific neurochemical state. FSI may be modifiable through interventions that reduce digital interruptions during face-to-face interaction and support meaningful synchronous engagement. Future research should validate its measurement, test causal pathways, and evaluate interventions across populations and social contexts.