Individuals develop diverse social attitudes during adolescence. This study focused on adolescents’ cooperative and competitive attitudes from grades 7–11 and their outcomes in grade 12. The sample included 6,908 South Korean adolescents (47.6% girls, mean age = 12.83, range = 12–15). Latent cross-lagged models revealed negative directional associations between cooperative and compet itive attitudes for grades 7–10, but no significant associations for grades 10–11. Cooperative attitudes contributed more to social than academic outcomes, whereas competitive attitudes more positively predicted academic outcomes. The results suggest that educators who support early to mid-adolescents’ cooperative or competitive attitudes need to strike a delicate balance as these attitudes do not change independently and both have distinct strengths and weaknesses.

个人在青春期会形成不同的社会态度。本研究侧重于 7-11 年级青少年的合作和竞争态度及其在 12 年级的结果。样本包括 6,908 名韩国青少年（47.6% 的女孩，平均年龄 = 12.83，范围 = 12-15）。潜在的交叉滞后模型显示 7-10 年级的合作和竞争态度之间存在负向关联，但 10-11 年级没有显着关联。合作态度对社会而非学术成果的贡献更大，而竞争态度更积极地预测学业成果。结果表明，支持早期至中期青少年合作或竞争态度的教育工作者需要取得微妙的平衡，因为这些态度不会独立改变，并且都有明显的优势和劣势。