The ability to link new pieces of information together and the capacity to solve entirely new problems reinforce each other as children grow. Researchers tracking elementary school students over three years found that improvements in learning associations predicted later gains in reasoning, and vice versa. These results, published in the journal Intelligence, show that these two foundational cognitive abilities develop in tandem rather than strictly operating in isolation. Associative learning is the mental process of forming connections between different pieces of information. Remembering a person’s name by linking it to their face or matching a vocabulary word to its basic definition relies on this process. Experiencing these connections allows people to organize scattered pieces of input into useful, structured knowledge. In a classroom, associative learning forms the bedrock of basic memorization, sequence recognition, and early concept formation. Fluid intelligence involves a decidedly different set of mental tools. It describes a person’s ability to think abstractly, adapt to unfamiliar situations, and solve novel problems. Instead of relying heavily on prior knowledge or memorized facts from a …