IQ tests can be used for a wide range of purposes including:

• Educational assessment and placement
• Assessment and diagnosis of intellectual disability
• Cognitive research
• Job candidate evaluation
• Assessing cognitive abilities including memory, speed, and attention

Modern intelligence tests often focus on abilities such as mathematical skills, memory, spatial perception, and language abilities.

The capacity to see relationships, solve problems, and remember information are important components of intelligence, so these are often the skills on which IQ tests focus.

Your IQ can have an impact on different areas of your life including school and work. High scores are often associated with higher achievement in school, while lower scores may be linked to some form of intellectual disability.

• Language skills
• Mathematical abilities
• Memory
• Processing speed
• Reasoning abilities
• Visual-spatial processing

• Discrimination : IQ tests have been used to justify eugenicist movements and discrimination against minority groups and disabled individuals.
• Validity : Not all experts agree on a standard definition of intelligence , so not all IQ tests measure the same things.
• Reliability : There is also the question of how reliable these tests are. Reliable IQ tests should provide consistent results. People should score roughly the same each time they take the test.

• Educational access and background
• Nutrition
• Culture
• Environment
• Overall health and medical conditions