This study was conducted to investigate the difference in response characteristics of PITR according to the level of use of smartphone by adolescents and to validate whether PITR can be used as a screening tool for adolescents. The study participants were cluster sampling of 406 students in grade 1-3 grades located in 2 middle schools of Gyeong-gi province. The research tools were PITR and the smartphone addiction test. Data were analyzed using a cross tabulation analysis of the difference in the response characteristics of PITR according to the degree of smartphone usage, and a discrimination analysis for the validity test of the smartphone addiction. The results were as follows. First, the stress response characteristics in the PITR of general users and high risk users of smartphone showed the significant differences in the amount of rain, intensity of rain, contact of people with rain, number of puddles, area of puddle, and contact of people with puddles. The stress coping resource response characteristics also showed the significant differences between groups in existence of boots, existence of hats, existence of indirect protection, size of characters, person balance, whole person expression, and quality of lines. Second, as a smartphone addiction screening tool, the discriminant power of PITR was 81.9%. The discriminant power was 82.1% in the general users and 81.0% is the high risk users. These findings imply that PITR is a valid tool to detect the degree of smartphone addiction among adolescents.