IQ Research Topic
Education and Lifestyle Factors
IQ test performance reflects ability plus conditions. Education, sleep quality, and physical activity are among the most studied modifiable factors.
Education Effects
- Meta-analyses show additional schooling is associated with measurable intelligence-score gains.
- Effects appear in both children and adults, with variation by design and outcome measure.
- School quality and sustained learning opportunities matter, not just years enrolled.
Sleep and Cognitive Performance
- Insufficient sleep is linked to poorer attention, working memory, and reasoning performance.
- Regular sleep schedules support more stable test-day performance.
- Short-term sleep loss can depress scores independent of baseline ability.
Physical Activity
- Aerobic fitness and activity interventions are associated with better executive-function outcomes in many cohorts.
- Effect sizes vary, but movement is one of the safest general supports for cognition.