Two Modes of Attention

Definition

Attention is not a single faculty but two structurally different ways of being in the world, each rooted in one cerebral hemisphere. The right hemisphere sustains broad, open, vigilant attention — "on the look out," alert to whatever is new, whole, or context-dependent. The left hemisphere sustains narrow, focused, selective attention aimed at grasping and manipulating what is already known. As McGilchrist puts it, the difference between the hemispheres is "not in the 'what', but in the 'how'" — not which tasks each performs, but the manner in which each attends.

In the Book

McGilchrist grounds this in neuropsychology's own taxonomy of attention — vigilance, sustained attention, alertness, focused attention, and divided attention — showing that the first three (the "intensity" axis) depend on the right hemisphere, while focused and divided attention (the "selectivity" axis) depend on the left. He illustrates the underlying logic with birds and animals: an animal must simultaneously peck narrowly at a single grain (left-hemisphere-type focus) and stay open to the broader field for predators (right-hemisphere-type vigilance) — two attentional demands that cannot both be met by the same narrow beam of focus at once. This is why the split between the hemispheres is asymmetrical rather than a redundant division of labour: each mode of attention brings a genuinely different world into being, one experienced as flowing and whole, the other as a "represented," fixed, decomposable version of that world.

Why It Matters

Recognizing that attention itself has structurally different modes — not just different objects — explains why the same situation can yield two incompatible but individually coherent readings: a expert's narrow diagnostic focus versus a generalist's contextual read, a system optimized for exploitation versus one held open for exploration. It reframes "what did you notice" as secondary to "how were you attending," which matters wherever a narrow, decontextualized focus (efficient but blind to context) competes with a broad, vigilant one (contextual but less decisive) — in expertise, organizational design, or any task that requires both zooming in and staying alert to the whole.