The MLAT is a secure test that is only available to government agencies, licensed clinical psychologists, and other selected groups who are deemed appropriate to administer the test for diagnostic purposes.  Sale of the MLAT to an end user is granted solely by permission of the SLTF and SLTF may refuse sale of the MLAT for any reason.  The MLAT is used principally with adults.

The Pimsleur Language Aptitude Battery (PLAB) is an off-the-shelf test available for sale to educators and others who have need for a language aptitude test.  It was designed in the 1960s by Dr. Paul Pimsleur for predicting who will be successful in foreign language learning and as a tool to aid in the diagnosis of foreign language learning disabilities.  The PLAB is intended for individuals from 7^th grade to adult. 

The MLAT-Elementary is an off-the-shelf test available for sale to educators and others who have need for a language aptitude test for English-speaking children in grades 3-6.  It was designed in the 1960s by Drs. John Carroll and Stanley Sapon for predicting success in foreign language learning and as a tool to aid in the diagnosis of foreign language learning disabilities.

The MLAT-Elementary Spanish Version is an off-the-shelf test available for sale to educators and others who have a need for a language test for Spanish-speaking children in grades 3-6.  It is an adaptation of the MLAT-Elementary, designed in the 1960s by Drs. John Carroll and Stanley Sapon for predicting success in foreign language learning and as a tool to aid in the diagnosis of foreign language learning disabilities.  It was adapted by Drs. Charles Stansfield, Daniel Reed, and Ana Maria Velasco in 2005.