<![CDATA[This study aims to determine the effect of the effectiveness of parent-child communication on children's self-confidence. The theory used is self-confidence from Lauster's theory (2012) and Communication Effectiveness from Maulana and Gumelar's theory (2013). This study uses a quantitative approach with the correlation method. The samples taken in this study were 50 children aged 12-16 years. The data collection technique was a self-confidence questionnaire with 25 statements and a communication effectiveness questionnaire with 25 statements. data processing techniques using validity test, reliability test, normality test, simple linear regression test and hypothesis testing. Test data analysis using the Z test on the hypothesis test. The results showed (1) The results of the calculation of the level of self-confidence of children aged 12-16 years with an average of 74.30 were in the medium category. (2) the normality test on the self-confidence questionnaire with a significant level of 0.05, namely Lcount > Ltable (0.496 > 0.1246) this indicates that the sample comes from a normal distribution. (3) the effectiveness of communication between parents and children aged 12-16 years in the communication effectiveness questionnaire with an average of 86.32 is in the high category. (4) the normality test on the communication effectiveness questionnaire is Lcount > Ltable (0.484 > 0.1246), this indicates that the sample comes from a normal distribution. (5) with the average score of the self-confidence questionnaire = 74.30, while the average score on the communication effectiveness questionnaire = 86.2. This can be obtained through the Z test which shows that Zcount = 2.270 and Ztable = 1.65 with = 0.05 and N = 50. In accordance with the criteria for acceptance and rejection of the hypothesis, the hypothesis is accepted if Zcount > Ztable where 2.270 > 1.65 from these calculations it can be seen that H1 (Hypothesis) is accepted. This shows that there is a significant effect between the effectiveness of communication and the self-confidence of children aged 12-16 years in Pulau Tagor Village, Serbajadi District, Serdang Bedagai Regency. Keywords: Effectiveness of Communication, Confidence]]>
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