Iq and grades correlation
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Summary
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These studies suggest that there is a significant correlation between IQ and grades, with intelligence being a strong predictor of academic performance across various grade levels and subjects.
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Introduction
The relationship between intelligence (IQ) and academic performance has been a subject of extensive research. Understanding this correlation is crucial for educational policy, psychological assessment, and predicting future success in various life domains.
Key Insights
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Strong Correlation Between IQ and Academic Performance:
- Multiple studies have found a significant positive correlation between IQ and school grades, with correlations ranging from 0.54 to 0.81 . This indicates that higher IQ scores are generally associated with better academic performance.
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IQ as the Best Predictor of Academic Achievement:
- Intelligence, as measured by standardized tests, consistently emerges as the strongest predictor of students' grade point average (GPA) across different grade levels and subjects .
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Stability of IQ-Academic Performance Relationship Over Time:
- The correlation between early school achievement and midlife IQ remains substantial, suggesting that the relationship between IQ and academic performance is stable over the lifespan.
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Moderating Factors:
- The relationship between IQ and academic performance can vary depending on school subjects, grade levels, and the type of intelligence test used . However, gender does not significantly affect this relationship.
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National IQs and Educational Achievement:
- At a national level, IQ scores strongly predict differences in scholastic achievement across countries, with correlations as high as 0.92. This suggests that national IQs and educational achievement may measure similar constructs.
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Additional Predictors:
- While IQ is a strong predictor, other factors such as personality traits (e.g., Conscientiousness, Openness) and self-assessed intelligence also contribute to academic performance, though to a lesser extent .
Conclusion
The research consistently shows a strong positive correlation between IQ and academic performance, making IQ a reliable predictor of scholastic success. This relationship is stable over time and across different educational contexts. While other factors like personality traits and self-assessed intelligence also play a role, IQ remains the most significant predictor of academic achievement.
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