Y-adjectives are English adjectives that end in an orthographic <y> and a /i/ sound, for example lazy. Deriving its hypotheses from previous corpus findings and construction-based principles to language study, the experiment here reported validates the benefit a comparative alternation account of y-adjectives will accrue from a consideration of more and -er constructions across disyllabic adjectives that are not y-ones (called the HANDSOME adjectives). Reading times related to the comparative constructions of morphologically complex and simple y-adjectives were collected before and after native speaker exposure to one of three treatments – a dialogue comprising multiple HANDSOME more constructions, a dialogue comprising multiple HANDSOME-er constructions, or a control condition. Processing of y-adjective more constructions was found eased with exposure to HANDSOME more constructions. This exposure moreover overrode an anticipated processing ease for simple y-adjective -er constructions, while an exposure to HANDSOME -er constructions overrode an anticipated processing ease for complex y-adjective more constructions. The findings support the value of a constructional approach to understanding y-adjective comparatives.