In a diagnostic context, standardized IQ tests are typically used to establish significant limitations in intellectual functioning.
In applied contexts, the term intellectual functioning has a broader meaning. The term intellectual functioning incorporates
- Common characteristics of intelligence (reasoning, planning, problem solving, abstract thinking, understanding complex ideas, learning quickly, and learning from experience),
- Abilities measured by IQ tests (language skills, mathematical abilities, memory, and spatial visualization), and the
- Notion that cognitive functioning is influenced by other forms of human functioning and systems of supports
In these contexts, intellectual functioning is a broader than intelligence but narrower than human functioning.