The purpose of this study was to determine the relationship of assertive behavior with self-adjustment of children aged 4-5 years in PAUD Harapan Bunda Air Panas Village district Pendalian IV Koto Rokan Hulu regency. This study was quantitative study with correlation study type. Sampling technique used in this study is a sample saturated with a total sample of 34 children. The data collection t…