On the basis of metamemory assessment research and theories of discourse comprehension, the Metacomprehension Scale (MCS) was designed to assess multiple dimensions of metacomprehension. In a sample of younger (n = 30) and older (n = 30) adults, we examined age differences in self-assessed components of metacomprehension and the relation of the MCS to comprehension performance and general verbal ability. Younger adults reported greater use of strategies to resolve comprehension failures (i.e., regulation) and placed higher value on good comprehension skills than older adults. The MCS revealed a substantial amount of variance in comprehension performance and verbal ability, with the regulation dimension of metacomprehension being a reliable and consistent predictor of performance. The results provided support for domain-specific assessment of metacognition and for the critical role of regulation in comprehension performance.Cognitive psychologists have hypothesized that individual differences in metacognition, for example, self-knowledge and personal beliefs, may represent a key to understanding cognition. Self-assessments of selfknowledge and personal beliefs related to cognition include, but are not limited to, confidence in one's abilities, knowledge about strategies, anxiety about performance, control over performance, and the value of good performance (Hultsch, Hertzog, Dixon, & Davidson, 1988). Much of the research on metacognition in adults has been domain specific. Indeed, recent research on metacognition in adults has focused primarily on metamemory. The pattern of age differences in metamemory reveal that older adults, compared to younger adults, expect that memory will deteriorate with age, perceive that they have less control over memory, and