The cultural bias of the Adult Performance Level Assessment, Form AA-l (APLA) was examined. The potential influence of cultural differences on scores of a major ethnic group, Acadians or Cajuns, was investigated. Assessment items most prone to produce differences in scores were isolated and administered to selected groups. No significant differences were found between the scores of the selected ethnic group of native Acadians and non-native Acadians. It was therefore concluded that the APLA was free of cultural bias relative to the ethnic or culturally different group identified as native Acadians. This conclusion applies only to the group of persons (reading levels from 4.0 to 9.0) attending adult education programs in Louisiana, since the entire population of native and non-native Acadians was not sampled. Further research with other ethnic groups would contribute to greater knowledge of the instrument's freedom from cultural bias, thus having a positive influence on its validity. (PN)