Diagnostics of lexical and semantic level of language in preschool age

This theses deals with diagnostic of speech development of pre-school children. Its focus is on lexical-semantic language level. The goal of my work is to trace and map diagnostic possibilities in the lexical- semantic area of of pre-school children and to introduce the international PPVT test , considering its adaptation into czech language environment. Theses consists of two parts - the theoretical and empiric. Theoretical part is concern with the most important theories and personalities in the speech development and the process of experiencing language, characteristics of pre-school period, ontogenesis of speech and the ways to evaluate vocabulary and semantics in Czech and overseas. The empiric part examines the usages of PPVT in czech environment. The survey was realised by quantitative research, using datas from 236 tested individuals. The PPVT was adapted into czech language and given to preschool children, whose results were compared with the results of american children. The outcomes of the empiric part could be a solution for future research in the area, with the purpose of adapting a testing- language instrument into czech language and widening the limited possibilities in the field of language and speech development evaluation. Keywords: ontogenesis of speech, pre-school period,..