The notion that specific psychological or cognitive functions are processed primarily on one side of the brain is known as: aphasia. plasticity. lateralization of function. neurogenesis.

The correct answer is **lateralization of function**. Lateralization of function refers to the idea that certain cognitive processes and functions are more dominant in one hemisphere of the brain than the other. For example, language processing is typically associated with the left hemisphere in right-handed individuals. Here's a brief explanation of the other terms for clarity: - **Aphasia**: A language disorder that affects a person's ability to communicate, often due to brain damage. - **Plasticity**: The brain's ability to change and adapt as a result of experience, which includes the ability to reorganize itself after injury. - **Neurogenesis**: The process of generating new neurons in the brain, which can occur in certain areas throughout life. Thus, the notion you are referring to is specifically about the lateralization of function.