Construction and Normalization of the Visual Perception Test for the Preschool and Elementary School Students in Tehran City

This research is executed to find a valid instrument for diagnosis of visual perception deficiencies. Test of visual perception is composed of 7 subskills as follows: visual-motor integration, figure ground, visual discrimination, form constancy, visualization, spatial relations, and visual sequential memory. The research covered 1600 elementary school and pre school students: 800 boys: 400 preschool students and 400 first grade elementary school students. 800 girls: 400 preschool students and 400 first grade elementary school students. The selection of the sample followed a multistage sampling method. A developmental test of visual perception and the Goodenough test were administered individually. Goodenough test was used to determine the value of criterion validity. Descriptive statistics, Cronbach's alpha, Pearson correlation coefficient, and t–test were used to analyze the data. The results showed: 1-Norm Tables for the total scores were demonstrated and listed for gender and academic grade, separately. 2-The reliability coefficients of test were found to be. 74. 3-The correlation coefficient between the created test and the criterion test for the total score and all subtests were significant. 4- The difference between the developmental visual perception in boys and girls was significant. 5- The difference between developmental visual perception in preschool and first grade elementary school students was significant.