Final answer:
Two theories propose different relationships between language and cognition. Language can shape thought and cognitive development, but there is debate about the exact nature of this relationship.
Step-by-step explanation:
There are two theories about the relationship between language and cognition. One theory proposes that language has no influence on cognition and that cognitive development occurs independently. Another theory suggests that language can shape the way people perceive and think about the world, and that cognitive development occurs in stages with language as a crucial tool for thought.
Research has shown that language acquisition occurs naturally and follows a predictable sequence. There is also evidence to support the idea that language can influence thought, such as studies on how different languages affect the way people perceive time. However, there is ongoing debate in psychology about the exact nature of the relationship between language and cognition.