 The PLAB is intended for use with native English speaking students in grades 7 through 12, although it is sometimes used with students as old as 20 years.The Pimsleur Language Aptitude Battery was developed by Dr. Paul Pimsleur, also known for the Pimsleur language learning system.The PLAB is the culmination of eight years of research by Pimsleur and his associates from 1958 to 1966, which involved the review of 30 years of published studies regarding a variety of linguistic and psychological factors involved in language learning.