Gloria Mark's research has always included attention to developmental trajectories, but the AI moment sharpens the concern. The principle is neurological: the brain builds the circuits it uses and prunes the circuits it does not. Children who grow up in environments of continuous AI-mediated stimulation — every question answered instantly, every pause filled productively, every moment of boredom resolved by a responsive tool — are building attentional circuits optimized for that environment and pruning the circuits that support sustained, self-directed attention in the absence of external stimulation. The concern is not speculative. It follows from the established neuroscience of attentional development and from Mark's own data on how attentional patterns established in digital environments become self-reinforcing.
Developmental attention unfolds across an extended period. The circuits that support sustained monotask engagement, tolerance for boredom, and the capacity to generate internal stimulation in the absence of external cues are built through repeated use during childhood and adolescence. The circuits are plastic during development and relatively fixed afterward. What is built during the developmental window becomes the attentional architecture the adult inhabits.
Pre-digital environments provided the conditions for building these circuits almost incidentally. Children waited — for parents, for meals, for entertainment that was not instantly available. They experienced boredom that had to be resolved internally because external resolution was not an option. They sustained attention on activities — reading, drawing, playing — because the alternatives required effort to access. The architecture that emerged was not optimized for any specific environment; it was a general-purpose attentional system capable of adapting to whatever environment it encountered.
Digital environments progressively weakened these conditions. The child with a smartphone no longer waits; the device resolves any pause. The child with access to streaming never experiences the kind of boredom that forces internal resolution. AI accelerates the trajectory: the child with access to conversational AI never has to sit with an unanswered question, never has to struggle through a homework problem alone, never has to build the cognitive capacities that struggle develops.
Mark's concern, expressed in her talks and writing, is not that children should be denied access to AI tools. The concern is that the developmental environment must include conditions under which the attentional circuits that AI cannot replace are built. Those circuits — sustained attention, boredom tolerance, self-directed cognitive engagement — are the foundation of adult judgment and creativity. The next generation cannot exercise those capacities as adults if they have not built them as children.
Mark's developmental concern has been articulated most fully in her UCSD Design Lab talk and in her writing on the future of attention. The framework draws on decades of developmental neuroscience and on her own research showing that attentional patterns, once established, are highly resistant to change through adult intervention.
Attention is built during development. The circuits that support adult cognitive capacities are constructed through use during childhood and adolescence.
Circuits unused are pruned. What the developing brain does not exercise, it eliminates — not through deliberate selection but through the default neurological process of synaptic pruning.
AI changes the developmental environment. Continuous AI-mediated stimulation removes the conditions under which sustained attention, boredom tolerance, and self-directed engagement are traditionally built.
The consequence is generational. Attentional patterns established during development become adult architecture; the cognitive capacities of tomorrow's adults are being shaped by today's developmental environments.
The intervention must be environmental. Individual parental resolve is insufficient against environmental pressure; structural intervention — in schools, in platform design, in cultural norms — is required.