The construction and trial study of a language development test for children up to three years of age

Although many investigators have been able to satisfactorily apply statistical formulae to show that certain aspects of language, such as grammatical usage and articulation, are independent, describable, testable, and significant abilities, a search of the literature failed to reveal a test that could be used to assess the language of an infant or child up to the age of three. The purpose of this study vas to construct a test for measuring the language age of children up to three years. This test vas administered to a stratified sample of children in order to evaluate it from the standpoint of (1) ease of administration, (2) validity of items, (3) reliability of measurement, and (U) adequacy of instructions. [...]