 She states that low PLAB scores on parts 5 and 6 are often reflective of hearing problems and that PLAB Part 6 (Sound-Symbol Association) measures the phonetic coding ability described by Carroll in his description of the components of foreign language aptitude.The uses of the Pimsleur Language Aptitude Battery include program placement, program assessment and planning, and diagnosis of learning abilities and diagnosis of a foreign language learning disability.Current users include private and public secondary schools and learning disabilities specialists.