Critical Language Scholarship Program
Applicants to the program must be U.S. citizens enrolled in a U.S. degree-granting program at the undergraduate or graduate level at the time of application. Undergraduate students must have completed at least one year of general college course-work by the start date of the program. Other requirements are that the applicants should be in acceptable mental and physical health for which persons granted the scholarship are usually required to submit a satisfactory Medical Information Form and Physician’s Statement. The minimum age is 18 by the beginning of the CLS Program in the particular year.
Critical period hypothesis
Studies of deaf children learning American Sign Language (ASL) have fewer methodological weaknesses. Newport and Supalla studied ASL acquisition in deaf children differing in age of exposure; few were exposed to ASL from birth, most of them first learned it at school. Results showed a linear decline in performance with increasing age of exposure; those exposed to ASL from birth performed best, and 'late learners' worst, on all production and comprehension tests. Their study thus provides direct evidence for language learning ability decreasing with age, but it does not add to Lenneberg's CP hypothesis as even the oldest children, the 'late learners', were exposed to ASL by age four, and had therefore not reached puberty, the proposed end of the CP. In addition, the declines were shown to be linear, with no sudden 'drop off' of ability at a certain age, as would be predicted by a strong CP hypothesis. That the children performed significantly worse may suggest that the CP ends earlier than originally postulated. However, this decline in performance may also be attributed in part to limitations of second language acquisition for hearing parents learning ASL.