Liu, Ho and Wilson reorganise the green-space–cognition problem around three pathways: functional, spatial and perceptual. Their scoping review identifies 37 relevant studies, distinguishing direct modelling of mechanisms from indirect inference and showing that air-pollution reduction and physical activity dominate the current evidence base, while heat reduction and social interaction remain comparatively underexamined. The paper’s strongest methodological critique concerns spatial resolution: arbitrary buffer zones and moderate-resolution greenness measures can obscure street-level differences and the actual forms of exposure through which cognition may be affected. Street-view imagery, local climate zones and finer-grained urban data are therefore proposed not as technological upgrades in themselves, but as ways to better align environmental measurement with functional experience. The broader contribution is a bridge between exposure science, cognition and urban morphology: “green space” becomes analytically insufficient unless its type, spatial configuration, perceptual availability and mechanism of action are differentiated.