Single effect theory of 'The Cask of Amontillado'?

The single effect theory suggests that all elements of a literary work should contribute to creating one emotional or psychological impact on the reader. In "The Cask of Amontillado," this effect is one of impending doom and dread as Montresor leads Fortunato to his demise. Every detail in the story, from Montresor's meticulous planning to the dark, underground setting, serves to build and heighten this sense of unease and foreboding.