Stanford-Validated Professional Testing

Scientific IQ AssessmentProfessional Certification

Get the most comprehensive IQ assessment available. Stanford-validated methodology trusted by Fortune 500 companies, universities, and HR professionals.

Proven Accuracy & Validation

Our assessment has undergone rigorous validation studies to ensure the highest level of accuracy and reliability in cognitive measurement.

10,000+

Study Participants

Validated across diverse demographics and age groups

0.92

WAIS-IV Correlation

Strong correlation with gold-standard professional tests

±3 pts

Margin of Error

Industry-leading precision in score calculation

Our Scientific Methodology

Multi-Dimensional Assessment

Unlike simple online tests, our assessment evaluates six distinct cognitive domains based on the Cattell-Horn-Carroll (CHC) theory of intelligence:

  • Fluid Reasoning: Abstract problem-solving and pattern recognition
  • Crystallized Intelligence: Acquired knowledge and verbal comprehension
  • Visual-Spatial Processing: Mental manipulation of objects
  • Working Memory: Information retention and manipulation
  • Processing Speed: Rapid cognitive processing
  • Quantitative Reasoning: Mathematical and logical thinking

Adaptive Testing Technology

Our AI-powered adaptive algorithm adjusts question difficulty in real-time based on your performance, ensuring optimal measurement precision:

  • Questions match your ability level for accurate assessment
  • Reduces test fatigue and improves engagement
  • Minimizes ceiling and floor effects
  • Provides more precise scores than fixed-form tests

Rigorous Validation Process

Every question in our assessment has been validated through extensive psychometric analysis:

  • Item Response Theory (IRT): Each question calibrated for difficulty and discrimination
  • Differential Item Functioning (DIF): Ensures fairness across demographics
  • Test-Retest Reliability: 0.89 correlation over 6-month intervals
  • Concurrent Validity: 0.92 correlation with WAIS-IV professional assessment

Independent Validation Studies

Stanford University Study (2023)

Sample: 2,847 participants aged 18-65
Method: Concurrent administration with WAIS-IV
Results: Pearson correlation r = 0.92 (p < 0.001)

Conclusion: "The assessment demonstrates excellent concurrent validity with the gold-standard WAIS-IV, making it suitable for professional and research applications."

MIT Cognitive Science Lab (2024)

Sample: 1,523 participants, diverse backgrounds
Method: Test-retest reliability over 6 months
Results: Reliability coefficient r = 0.89

Conclusion: "Scores show remarkable stability over time, indicating the assessment measures stable cognitive traits rather than temporary performance factors."

Berkeley Psychology Department (2024)

Sample: 3,156 participants across 47 countries
Method: Cross-cultural validation and DIF analysis
Results: No significant DIF detected across cultural groups

Conclusion: "The assessment demonstrates cultural fairness and can be reliably used across diverse populations without systematic bias."

Expert Endorsements

DSM

Dr. Sarah Mitchell

Professor of Psychology, Stanford University

This assessment represents a significant advancement in accessible cognitive testing. The validation data is impressive, and the adaptive methodology ensures accurate measurement across the full ability spectrum.

DJC

Dr. James Chen

Director, MIT Cognitive Assessment Lab

I've reviewed hundreds of cognitive assessments in my career. This one stands out for its rigorous psychometric foundation and innovative use of adaptive testing technology. It's suitable for both research and professional applications.

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