Psycholinguistic Evaluation: 
Evaluation methods included direct observation, record review, videotape analysis, parent interview, and the Vineland Adaptive Behavioral Scale, Second Edition. Additional methods to evaluate early language development included the sentence verification task and the Peabody Picture Vocabulary Test. The parents were administered the Vineland Adaptive Behavioral Scale. Unfortunately, the subject was not compliant to participate in this test.
Test of Early Language Development-Second Edition is a standardized psycholinguistic instrument which measures language ability between the ages of newborn and eight years of age. The Sentence Verification Task evaluated comprehension of children with limited productive skills by presenting sentences orally and asking for the judgment of the truth of the sentence. The Peabody Picture Vocabulary test is a standardized psycholinguistic instrument which presents four pictures and asks the child to identify one from the group.