<![CDATA[This study aims to examine the relationship between sibling rivalry and authoritarian parenting style with achievement motivation among university students. The participants in this study were 80 active students from a university in Kudus City, selected through purposive sampling. The research instruments used included a sibling rivalry scale, an authoritarian parenting style scale, and an achievement motivation scale. The results showed that the correlation coefficient between the three variables (rx1,2) was 0.356 with a significance level of p = 0.005 (p < 0.01), and an effective contribution of 12.7%. This indicates a highly significant relationship between sibling rivalry (X1) and authoritarian parenting style (X2) with achievement motivation (Y). The first minor hypothesis test revealed a significant negative relationship between sibling rivalry and achievement motivation, with a correlation coefficient of rx1y of -0.239 and a p-value of 0.032 (p < 0.05). The second minor hypothesis test also indicated a highly significant negative relationship between authoritarian parenting style and achievement motivation, with a correlation coefficient of rx2y of -0.343 and a p-value of 0.002 (p < 0.01). Based on these findings, it can be concluded that there is a significant negative relationship between the variables. Both sibling rivalry and authoritarian parenting style are negatively associated with students’ achievement motivation.]]>
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