their mental representations of what was happening in the story. Situation models guide reading comprehension and memory; without them, we get lost, which explains, in neuropsychological terms, why the scrambled sentences were harder to remember
It is interesting to think about how much we rely on our imagination to create a picture in our mind that helps us to understand and feel the material we are reading. It makes sense that we would be confused if our picture couldn't be created in our minds because of factors like incoherent sentences. Makes an author think about constructing sentences in good flow so that the reader can stay engage and build on their "mental representation" of the reading.