Schemas influence memory formation and retrieval in several ways. Bartlett (1932) found that British participants assimilated and distorted a story to fit their cultural schemas over repeated retellings. Johnson and Bayford (1972) showed that providing a laundry schema before a paragraph improved recall versus no schema. Brewer and Treyens (1981) found schemas aided recall of typical office items but atypical items like a skull were also recalled. Allport and Postman (1947) showed racial schemas distorted a story's retelling between white and black participants. Overall, schemas act as filters that organize new information and reconstruct memories to fit existing knowledge structures.