We can talk about three different interactions when we investigate the complex relationships between language and thinking. First, the existence of language as a cognitive process affects the system of thinking. Second, thinking comes before language, and the learning of a language interacts with the conceptual process that is formed before language use. Third, each language spoken may affect the system of thinking. Here we will discuss these three interactions under these subsections: “thinking without language,” “thinking before language,” and “thinking with language.”

Babies can categorize objects and actions, understand the cause and effect relationship between events, and see the goals in a movement. Recent studies on action representation and spatial concepts have shown that babies’ universal and language-general action representation productively changes with the learning of the mother tongue. For example, languages use prepositions to express the relationship between objects, i.e., in, on, under. However, languages also vary how they use these relations. One of the most significant studies suggests that babies can differentiate between concepts expressed with prepositions such as containment (in) and support (on). The Korean language specifies the nature of these containment and support relationships using the tightness of the relationship between objects: tight or loose. For example, a pencil in a pencil-size box represents a tight relationship, while a pencil in a big basket represents a loose relationship.

In the late 1800s, anthropologist Franz Boas laid the foundations of cultural relativity. According to this point of view, individuals see and perceive the world within the boundaries of their cultures. The role of anthropology is to investigate how people are conditioned by their culture and how they interact with the world in different ways. To understand such mechanisms, it suggests, implications in culture and language should be studied. The reflection of this view in the relationship between language and thought is the linguistic determinism hypothesis advanced by Eric Safir and Benjamin Lee Whorf. This hypothesis suggests that thought emerges only with the effect of language and concepts that are believed to exist even in infancy fade away due to the language learned.