TY - JOUR AU - Ogy Yan Hesta AU - Agus Basuki PY - 2021/12/29 Y2 - 2024/03/29 TI - Development of Self-Control Instruments for Aggressive Behaviorin the Class Xi Vocational School of Diponegoro Majenang JF - KnE Social Sciences JA - KSS VL - 6 IS - 2 SE - Articles DO - 10.18502/kss.v6i2.10004 UR - https://knepublishing.com/index.php/KnE-Social/article/view/10004 AB - Verbal aggressive behavior is exhibited in individuals due to low self-control. This study aimed to develop instruments for aggressive behavior in students, to help improve the students’ self-control. The instrument development method was used. The data were collected through a questionnaire tested on 30 students of class XI SMK Diponegoro Majenang, chosen by random sampling. The Aiken formula with valid conditions > 0.73 was used for evaluating the validity. The KMO test results of 0.728 > 0.50 meant that the instrument could be considered valid as a measuring instrument. The reliability test was carried out with the Alpha Cronbach formula and a result of 0.853 > 0.60 was obtained. This meant that the self-control scale could be considered reliable to measure the level of control in students exhibiting aggressive behavior.Keywords: development; instrument; self-control; aggressive behavior ER -