How do the preschool age children percieve the geometry concepts which are learnt?

The aim of the study is to describe how the preschool age children percieve and recognize the geometrical forms and concepts which are used to distinguish the forms from each other.In this study the content analysis, one of the qualiative research methods, was used. The participants of the research consist of 25 children who were at the age of 4-6 from an infant school of a primary school of Keçiören Education Dictorate, located in one of the central Districts of Ankara.This study was performed in 2008-2009 Education Year. The data of the study were collected by negotiations and written documents. During the study, each child was successively given the diagnostic tests of horizontal line, vertical line, curve line, margin, corner square, rectangle, triangle and circle geaometrical forms; and they were asked to classify the forms shown on the diagnostic tests.In the lights of the research findins, suggestions and conclusions which include the sub-problems of the research related to how the children percieve and learn the geometrical concepts that are shown were stated.According to the research findings, it has been revealed that the research group particants, who were at preschool age in the infant school, have significant difficulties in distinguishing and associating the geometrical concepts of the geometrical forms shown; altough they were significantly successful at recognizing the typical examples of the geometrical forms, they have significant difficulties in recognizing and distinguishing the geometrical forms when their typical eccentricity, screwness, and the dimensions were changed.