The Influence of Nutritional Status and Intelligence Quotient on Academic Achievement of Adolescents Aged 16-17 Years Old

The purpose of this study was to determine the effect of nutritional status and intelligence quotient (IQ) on academic achievement of adolescent students 16-17 years at SMK Negeri 2 Purworejo. The study used descriptive research method with two independent variables and one dependent variable, sampling using quota sampling technique. The research subjects were teenage students 16-17 years old at SMK Negeri 2 Purworejo which totalled 149 students. Data collection methods using tests and documentation analysis, data analysis using multiple linear regression analysis. The results showed a significant effect of nutritional status on improving the academic achievement of adolescent students 1617 years at SMK Negeri 2 Purworejo with regression coefficient obtained a value of 0.017 smaller than the significance value of 0.05 and coefficient of determination 32%. There is no significant effect of intelligence quotient (IQ) on improving academic achievement of adolescent students 16-17 years old at SMK Negeri 2 Purworejo with a regression coefficient obtained a value of 0.258 greater than the significance value of 0.05 and a coefficient of determination of 2%. Nutritional Status and Intelligence quotient (IQ) together there is a significant influence on improving the academic achievement of adolescent students 16-17 years at SMK Negeri 2 Purworejo with regression coefficient obtained value of 0.010 smaller than the significance value of 0.05 and coefficient of determination 58%.