This research exercise was undertaken in order to examine whether academic achievement, academic attitudes, achievement goals, and family process had an influence on beliefs about intellectual ability. The subjects were 434 junior-high school students in Seoul and Incheon. The results of this study indicated that 162 students with incremental beliefs had higher scores in all five sub-factors of academic attitudes, two sub-factors in their achievement goals (namely their mastery goals and approach performance goals), and four sub-factors of family process (closeness, monitoring, communication, and approval) than 155 students with entity beliefs. The results of the binary logistic regression analysis revealed that academic self-perceptions, attitudes towards teachers, goal values, approach performance goals, closeness, and communication factors significantly affected beliefs about intellectual ability.