Bullying often occurs during adolescence, for secondary reasons, such as joking about body shape or other things. Changes that occur during adolescence can cause emotional shifts, often giving rise to indecision and a sense of loss of control. Someone affected by bullying will feel low self-esteem. One therapeutic modality that can be applied is Cognitive Therapy. This cognitive therapy aims to develop rational thinking patterns by changing irrational thinking patterns that often lead to behavioral disorders into rational thinking based on facts and actual information. This study aims to determine the effect of cognitive therapy on the self-esteem of adolescent victims of bullying. The methodology used was a Quasi-experimental pre-post test with an intervention package providing cognitive therapy to the intervention group. The self-esteem instrument used a questionnaire from Stuart's theory that assessed cognitive, affective, social, and physical aspects. Cognitive therapy significantly impacted the self-esteem of adolescent victims of bullying, with a p-value of 0.005. This suggests that cognitive therapy is essential for developing and implementing psychiatric nursing care for adolescent victims of bullying to improve their self-esteem. This study demonstrates that cognitive therapy can significantly improve the self-esteem of adolescent victims of bullying. Cognitive therapy has been shown to improve low self-esteem in adolescent victims of bullying.
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