The "g 요인" (g factor) is a concept in psychology that refers to general intelligence. It suggests that individuals possess a common cognitive ability that influences their performance across various intellectual tasks. This idea was first introduced by psychologist Charles Spearman in the early 20th century, who believed that a single underlying factor contributes to different types of cognitive abilities. Research has shown that the g factor can predict academic success and job performance. It is often measured through standardized tests that assess reasoning, problem-solving, and verbal skills. Understanding the g factor helps educators and psychologists identify strengths and weaknesses in cognitive functioning.